RE: Prevent sending attachments
that's pretty effectivetake something technical looking to management, and make sure the bit with the 'estimated cost of recovery' is in nice, easy read tahoma with a BIG number on it, and you can guarantee they'll sort it for you :o) -Original Message- From: Toni, Randy [mailto:[EMAIL PROTECTED]] Sent: 31 October 2001 21:07 To: MS-Exchange Admin Issues Subject: RE: Prevent sending attachments Internally - we just have the policy - can't really help you there with any s/w or h/w. Externally - we have a scaled-down SMTP proxy now enabled on the firewall (Watchguard appliance) which can filter on MIME type as well as file extension for the Internet mail (in or out). This isn't bullet proof for a few reasons including (1) some legitimate stuff comes in using a generic MIME header (I'm told this is due to improperly configured or very old e-mail client software) so we can't strip those off, but some crap can also hide behind that same generic MIME type, and (b) MIME types are not really as standard as they should be (there are sometimes some slight variations that show up and get clobbered until we log them and add them to the OK list). If a spreadsheet dies at the gateway because the MIME type is application\ms-excel, and we've defined application/msexcel as the safe type we catch this and add the additional MIME type. Seems ugly but in fact but we picked up these few strays quickly and rarely see any roadkill now. For this small amount of grief I can say that it has helped to block a lot of crap at the perimeter. It works for us because we only consider very few apps to be safe - anything other than docs or spreadsheets or pdf files is generally not delivered to the users. If you allow a zillion different types of apps then with all the variations in MIME this might be more trouble than it's worth for you. It's not a solution - just another part of the process of housekeeping. Having said that, I should add that we try to apply the technology to the junk coming in - as for the users internally we rely on a policy (no-one opens, installs, runs, plays, saves any exe's or scripts or jokes or games or whateverperiod). I'd like to have a bullet proof way to enforce that internally - I don't. But in the case of someone deliberately acting to circumvent that policy, I would pay a visit to management armed with my copy of the policy and whatever evidence I have that the policy is being stomped on, as well as a ton of information on the destructive power (and estimated costs) that result from this kind of action in other locations. Let them take it from there (evil vindictive #^$%@* that I am...) If that doesn't work, there's always beer... Sorry for the rant -Original Message- From: Vlastimil Schart [SMTP:[EMAIL PROTECTED]] Sent: October 31, 2001 6:35 AM To: MS-Exchange Admin Issues Subject: Prevent sending attachments Hi there, We are using Exchange Server 5.5 SP3 on a Windows NT Server 4.0 SP6. Clients are using Outlook 97. Is there a way to prevent users from sending attachment of a specific filetype ? For instance *.mpeg, *.avi an so on ? Both internal and external mail. Regards, Vlastimil Schart Arcus ASA List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm
RE: Prevent sending attachments
The only thing that comes to mind is a decent Exchange Antivirus Scanner with attachment blocking enabled. It won't stop people from sending the file, but the Antivirus Scanner will strip the file out of the message. TrendMicro Scanmail for Exchange comes to mind (though others on the list have other favorites) The clear consensus on the list is to stear clear of any CA product. -Original Message- From: Vlastimil Schart [mailto:[EMAIL PROTECTED]] Sent: Wednesday, October 31, 2001 03:35 To: MS-Exchange Admin Issues Subject: Prevent sending attachments Hi there, We are using Exchange Server 5.5 SP3 on a Windows NT Server 4.0 SP6. Clients are using Outlook 97. Is there a way to prevent users from sending attachment of a specific filetype ? For instance *.mpeg, *.avi an so on ? Both internal and external mail. Regards, Vlastimil Schart Arcus ASA List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm
RE: Prevent sending attachments
I use Antigen to remove attachments that my company deems not work related. It also is a damn good antivirus scanner as well. I run it on Exchange 5.5. Mark -Original Message- From: Vlastimil Schart [mailto:[EMAIL PROTECTED]] Sent: Wednesday, October 31, 2001 6:35 AM To: MS-Exchange Admin Issues Subject: Prevent sending attachments Hi there, We are using Exchange Server 5.5 SP3 on a Windows NT Server 4.0 SP6. Clients are using Outlook 97. Is there a way to prevent users from sending attachment of a specific filetype ? For instance *.mpeg, *.avi an so on ? Both internal and external mail. Regards, Vlastimil Schart Arcus ASA List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm
RE: Prevent sending attachments
Your Exchange aware Antivirus SW should be able to do this. What are you using? -Original Message- From: Vlastimil Schart [mailto:[EMAIL PROTECTED]] Sent: Wednesday, October 31, 2001 3:35 AM To: MS-Exchange Admin Issues Subject: Prevent sending attachments Hi there, We are using Exchange Server 5.5 SP3 on a Windows NT Server 4.0 SP6. Clients are using Outlook 97. Is there a way to prevent users from sending attachment of a specific filetype ? For instance *.mpeg, *.avi an so on ? Both internal and external mail. Regards, Vlastimil Schart Arcus ASA List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm
RE: Prevent sending attachments
Title: RE: Prevent sending attachments NAV for Exchange can do this with a registry tweak.. Its in the read me. What id like is software that filters file types without using extentions. -Original Message- From: Martin Blackstone [mailto:[EMAIL PROTECTED]] Sent: Wednesday, October 31, 2001 7:35 AM To: MS-Exchange Admin Issues Subject: RE: Prevent sending attachments Your Exchange aware Antivirus SW should be able to do this. What are you using? -Original Message- From: Vlastimil Schart [mailto:[EMAIL PROTECTED]] Sent: Wednesday, October 31, 2001 3:35 AM To: MS-Exchange Admin Issues Subject: Prevent sending attachments Hi there, We are using Exchange Server 5.5 SP3 on a Windows NT Server 4.0 SP6. Clients are using Outlook 97. Is there a way to prevent users from sending attachment of a specific filetype ? For instance *.mpeg, *.avi an so on ? Both internal and external mail. Regards, Vlastimil Schart Arcus ASA List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm
RE: Prevent sending attachments
Title: Message it's a nice thought.it'd take a hell of a lot of doing thoughyou'd be looking at opening every single attachment that comes through, and analysing it to determine what file type it isCan't see that having a good effect on performance... -Original Message-From: Snook, Kevin S (ITD) [mailto:[EMAIL PROTECTED]]Sent: 31 October 2001 14:50To: MS-Exchange Admin IssuesSubject: RE: Prevent sending attachments Why not? -Original Message-From: Martin Blackstone [mailto:[EMAIL PROTECTED]]Sent: 31 October 2001 13:44To: MS-Exchange Admin IssuesSubject: RE: Prevent sending attachments What do you mean? Something that would block a .EXE file even if the extension was changed to .XXX? H.interesting. -Original Message-From: MHR(Michael Ross) [mailto:[EMAIL PROTECTED]] Sent: Wednesday, October 31, 2001 5:36 AMTo: MS-Exchange Admin IssuesSubject: RE: Prevent sending attachments NAV for Exchange can do this with a registry tweak.. Its in the read me. What id like is software that filters file types without using extentions. -Original Message- From: Martin Blackstone [mailto:[EMAIL PROTECTED]] Sent: Wednesday, October 31, 2001 7:35 AM To: MS-Exchange Admin Issues Subject: RE: Prevent sending attachments Your Exchange aware Antivirus SW should be able to do this. What are you using? -Original Message- From: Vlastimil Schart [mailto:[EMAIL PROTECTED]] Sent: Wednesday, October 31, 2001 3:35 AM To: MS-Exchange Admin Issues Subject: Prevent sending attachments Hi there, We are using Exchange Server 5.5 SP3 on a Windows NT Server 4.0 SP6. Clients are using Outlook 97. Is there a way to prevent users from sending attachment of a specific filetype ? For instance *.mpeg, *.avi an so on ? Both internal and external mail. Regards, Vlastimil Schart Arcus ASA List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at:http://www.sunbelt-software.com/exchange_list_charter.htmList Charter and FAQ at:http://www.sunbelt-software.com/exchange_list_charter.htmList Charter and FAQ at:http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm
RE: Prevent sending attachments
Title: Message thats what i want, but currently i cant find software do block it like that. i can block .exe files, but if you send me an exe file renamed to .MSN, that file still comes thru. -Original Message-From: Snook, Kevin S (ITD) [mailto:[EMAIL PROTECTED]] Sent: Wednesday, October 31, 2001 8:50 AMTo: MS-Exchange Admin IssuesSubject: RE: Prevent sending attachments Why not? -Original Message-From: Martin Blackstone [mailto:[EMAIL PROTECTED]]Sent: 31 October 2001 13:44To: MS-Exchange Admin IssuesSubject: RE: Prevent sending attachments What do you mean? Something that would block a .EXE file even if the extension was changed to .XXX? H.interesting. -Original Message-From: MHR(Michael Ross) [mailto:[EMAIL PROTECTED]] Sent: Wednesday, October 31, 2001 5:36 AMTo: MS-Exchange Admin IssuesSubject: RE: Prevent sending attachments NAV for Exchange can do this with a registry tweak.. Its in the read me. What id like is software that filters file types without using extentions. -Original Message- From: Martin Blackstone [mailto:[EMAIL PROTECTED]] Sent: Wednesday, October 31, 2001 7:35 AM To: MS-Exchange Admin Issues Subject: RE: Prevent sending attachments Your Exchange aware Antivirus SW should be able to do this. What are you using? -Original Message- From: Vlastimil Schart [mailto:[EMAIL PROTECTED]] Sent: Wednesday, October 31, 2001 3:35 AM To: MS-Exchange Admin Issues Subject: Prevent sending attachments Hi there, We are using Exchange Server 5.5 SP3 on a Windows NT Server 4.0 SP6. Clients are using Outlook 97. Is there a way to prevent users from sending attachment of a specific filetype ? For instance *.mpeg, *.avi an so on ? Both internal and external mail. Regards, Vlastimil Schart Arcus ASA List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at:http://www.sunbelt-software.com/exchange_list_charter.htmList Charter and FAQ at:http://www.sunbelt-software.com/exchange_list_charter.htmList Charter and FAQ at:http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm
RE: Prevent sending attachments
Title: Message Definitely. It's all too easy to change the extension of a file so it's allowed through a virus scanner/mail management software when it shouldn't be, and then renamed at the other end. We have a similar problem on our file server. We've prohibited people from saving particular files, such as mp3, but they can all bypass it by changing the extension of the file to .zip or .doc. -Original Message-From: Snook, Kevin S (ITD) [mailto:[EMAIL PROTECTED]]Sent: 31 October 2001 14:50To: MS-Exchange Admin IssuesSubject: RE: Prevent sending attachments Why not? -Original Message-From: Martin Blackstone [mailto:[EMAIL PROTECTED]]Sent: 31 October 2001 13:44To: MS-Exchange Admin IssuesSubject: RE: Prevent sending attachments What do you mean? Something that would block a .EXE file even if the extension was changed to .XXX? H.interesting. -Original Message-From: MHR(Michael Ross) [mailto:[EMAIL PROTECTED]] Sent: Wednesday, October 31, 2001 5:36 AMTo: MS-Exchange Admin IssuesSubject: RE: Prevent sending attachments NAV for Exchange can do this with a registry tweak.. Its in the read me. What id like is software that filters file types without using extentions. -Original Message- From: Martin Blackstone [mailto:[EMAIL PROTECTED]] Sent: Wednesday, October 31, 2001 7:35 AM To: MS-Exchange Admin Issues Subject: RE: Prevent sending attachments Your Exchange aware Antivirus SW should be able to do this. What are you using? -Original Message- From: Vlastimil Schart [mailto:[EMAIL PROTECTED]] Sent: Wednesday, October 31, 2001 3:35 AM To: MS-Exchange Admin Issues Subject: Prevent sending attachments Hi there, We are using Exchange Server 5.5 SP3 on a Windows NT Server 4.0 SP6. Clients are using Outlook 97. Is there a way to prevent users from sending attachment of a specific filetype ? For instance *.mpeg, *.avi an so on ? Both internal and external mail. Regards, Vlastimil Schart Arcus ASA List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at:http://www.sunbelt-software.com/exchange_list_charter.htmList Charter and FAQ at:http://www.sunbelt-software.com/exchange_list_charter.htmList Charter and FAQ at:http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm
RE: Prevent sending attachments
Title: Message Hello ... is this thing on ?? Antigen http://www.sybari.com/products/antigen_exchange.asp can do this for exchange. If someone sends you an mp3 file or an exe and they rename it, it will still pick it up because itchecks the attachments based on extension and file type. -Original Message-From: Robin Lawrie [mailto:[EMAIL PROTECTED]]Sent: 31 October 2001 14:47To: MS-Exchange Admin IssuesSubject: RE: Prevent sending attachments Definitely. It's all too easy to change the extension of a file so it's allowed through a virus scanner/mail management software when it shouldn't be, and then renamed at the other end. We have a similar problem on our file server. We've prohibited people from saving particular files, such as mp3, but they can all bypass it by changing the extension of the file to .zip or .doc. -Original Message-From: Snook, Kevin S (ITD) [mailto:[EMAIL PROTECTED]]Sent: 31 October 2001 14:50To: MS-Exchange Admin IssuesSubject: RE: Prevent sending attachments Why not? -Original Message-From: Martin Blackstone [mailto:[EMAIL PROTECTED]]Sent: 31 October 2001 13:44To: MS-Exchange Admin IssuesSubject: RE: Prevent sending attachments What do you mean? Something that would block a .EXE file even if the extension was changed to .XXX? H.interesting. -Original Message-From: MHR(Michael Ross) [mailto:[EMAIL PROTECTED]] Sent: Wednesday, October 31, 2001 5:36 AMTo: MS-Exchange Admin IssuesSubject: RE: Prevent sending attachments NAV for Exchange can do this with a registry tweak.. Its in the read me. What id like is software that filters file types without using extentions. -Original Message- From: Martin Blackstone [mailto:[EMAIL PROTECTED]] Sent: Wednesday, October 31, 2001 7:35 AM To: MS-Exchange Admin Issues Subject: RE: Prevent sending attachments Your Exchange aware Antivirus SW should be able to do this. What are you using? -Original Message- From: Vlastimil Schart [mailto:[EMAIL PROTECTED]] Sent: Wednesday, October 31, 2001 3:35 AM To: MS-Exchange Admin Issues Subject: Prevent sending attachments Hi there, We are using Exchange Server 5.5 SP3 on a Windows NT Server 4.0 SP6. Clients are using Outlook 97. Is there a way to prevent users from sending attachment of a specific filetype ? For instance *.mpeg, *.avi an so on ? Both internal and external mail. Regards, Vlastimil Schart Arcus ASA List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at:http://www.sunbelt-software.com/exchange_list_charter.htmList Charter and FAQ at:http://www.sunbelt-software.com/exchange_list_charter.htmList Charter and FAQ at:http://www.sunbelt-software.com/exchange_list_charter.htmList Charter and FAQ at:http://www.sunbelt-software.com/exchange_list_charter.htm This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify us immediately at [EMAIL PROTECTED] and delete this E-mail from your system. Thank you. It is possible for data transmitted by email to be deliberately or accidentally corrupted or intercepted. For this reason, where the communication is by email, the Bank of Ireland Group does not accept any responsibility for any breach of confidence which may arise through the use of this medium. This footnote also confirms that this email message has been swept for the presence of known computer viruses. List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm
RE: Prevent sending attachments
Title: Message It sounds cool. -Original Message-From: Snook, Kevin S (ITD) [mailto:[EMAIL PROTECTED]] Sent: Wednesday, October 31, 2001 6:50 AMTo: MS-Exchange Admin IssuesSubject: RE: Prevent sending attachments Why not? -Original Message-From: Martin Blackstone [mailto:[EMAIL PROTECTED]]Sent: 31 October 2001 13:44To: MS-Exchange Admin IssuesSubject: RE: Prevent sending attachments What do you mean? Something that would block a .EXE file even if the extension was changed to .XXX? H.interesting. -Original Message-From: MHR(Michael Ross) [mailto:[EMAIL PROTECTED]] Sent: Wednesday, October 31, 2001 5:36 AMTo: MS-Exchange Admin IssuesSubject: RE: Prevent sending attachments NAV for Exchange can do this with a registry tweak.. Its in the read me. What id like is software that filters file types without using extentions. -Original Message- From: Martin Blackstone [mailto:[EMAIL PROTECTED]] Sent: Wednesday, October 31, 2001 7:35 AM To: MS-Exchange Admin Issues Subject: RE: Prevent sending attachments Your Exchange aware Antivirus SW should be able to do this. What are you using? -Original Message- From: Vlastimil Schart [mailto:[EMAIL PROTECTED]] Sent: Wednesday, October 31, 2001 3:35 AM To: MS-Exchange Admin Issues Subject: Prevent sending attachments Hi there, We are using Exchange Server 5.5 SP3 on a Windows NT Server 4.0 SP6. Clients are using Outlook 97. Is there a way to prevent users from sending attachment of a specific filetype ? For instance *.mpeg, *.avi an so on ? Both internal and external mail. Regards, Vlastimil Schart Arcus ASA List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at:http://www.sunbelt-software.com/exchange_list_charter.htmList Charter and FAQ at:http://www.sunbelt-software.com/exchange_list_charter.htmList Charter and FAQ at:http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm
RE: Prevent sending attachments
Title: Message I believe that antigen is aware of this trick and will still remove it. -Original Message-From: Robin Lawrie [mailto:[EMAIL PROTECTED]]Sent: Wednesday, October 31, 2001 9:47 AMTo: MS-Exchange Admin IssuesSubject: RE: Prevent sending attachments Definitely. It's all too easy to change the extension of a file so it's allowed through a virus scanner/mail management software when it shouldn't be, and then renamed at the other end. We have a similar problem on our file server. We've prohibited people from saving particular files, such as mp3, but they can all bypass it by changing the extension of the file to .zip or .doc. -Original Message-From: Snook, Kevin S (ITD) [mailto:[EMAIL PROTECTED]]Sent: 31 October 2001 14:50To: MS-Exchange Admin IssuesSubject: RE: Prevent sending attachments Why not? -Original Message-From: Martin Blackstone [mailto:[EMAIL PROTECTED]]Sent: 31 October 2001 13:44To: MS-Exchange Admin IssuesSubject: RE: Prevent sending attachments What do you mean? Something that would block a .EXE file even if the extension was changed to .XXX? H.interesting. -Original Message-From: MHR(Michael Ross) [mailto:[EMAIL PROTECTED]] Sent: Wednesday, October 31, 2001 5:36 AMTo: MS-Exchange Admin IssuesSubject: RE: Prevent sending attachments NAV for Exchange can do this with a registry tweak.. Its in the read me. What id like is software that filters file types without using extentions. -Original Message- From: Martin Blackstone [mailto:[EMAIL PROTECTED]] Sent: Wednesday, October 31, 2001 7:35 AM To: MS-Exchange Admin Issues Subject: RE: Prevent sending attachments Your Exchange aware Antivirus SW should be able to do this. What are you using? -Original Message- From: Vlastimil Schart [mailto:[EMAIL PROTECTED]] Sent: Wednesday, October 31, 2001 3:35 AM To: MS-Exchange Admin Issues Subject: Prevent sending attachments Hi there, We are using Exchange Server 5.5 SP3 on a Windows NT Server 4.0 SP6. Clients are using Outlook 97. Is there a way to prevent users from sending attachment of a specific filetype ? For instance *.mpeg, *.avi an so on ? Both internal and external mail. Regards, Vlastimil Schart Arcus ASA List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at:http://www.sunbelt-software.com/exchange_list_charter.htmList Charter and FAQ at:http://www.sunbelt-software.com/exchange_list_charter.htmList Charter and FAQ at:http://www.sunbelt-software.com/exchange_list_charter.htmList Charter and FAQ at:http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm
RE: Prevent sending attachments
Title: Message Personally I don't have a problem with that YET. My developers regularly do this to get data from other companies, etc. -Original Message-From: MHR(Michael Ross) [mailto:[EMAIL PROTECTED]] Sent: Wednesday, October 31, 2001 6:27 AMTo: MS-Exchange Admin IssuesSubject: RE: Prevent sending attachments thats what i want, but currently i cant find software do block it like that. i can block .exe files, but if you send me an exe file renamed to .MSN, that file still comes thru. -Original Message-From: Snook, Kevin S (ITD) [mailto:[EMAIL PROTECTED]] Sent: Wednesday, October 31, 2001 8:50 AMTo: MS-Exchange Admin IssuesSubject: RE: Prevent sending attachments Why not? -Original Message-From: Martin Blackstone [mailto:[EMAIL PROTECTED]]Sent: 31 October 2001 13:44To: MS-Exchange Admin IssuesSubject: RE: Prevent sending attachments What do you mean? Something that would block a .EXE file even if the extension was changed to .XXX? H.interesting. -Original Message-From: MHR(Michael Ross) [mailto:[EMAIL PROTECTED]] Sent: Wednesday, October 31, 2001 5:36 AMTo: MS-Exchange Admin IssuesSubject: RE: Prevent sending attachments NAV for Exchange can do this with a registry tweak.. Its in the read me. What id like is software that filters file types without using extentions. -Original Message- From: Martin Blackstone [mailto:[EMAIL PROTECTED]] Sent: Wednesday, October 31, 2001 7:35 AM To: MS-Exchange Admin Issues Subject: RE: Prevent sending attachments Your Exchange aware Antivirus SW should be able to do this. What are you using? -Original Message- From: Vlastimil Schart [mailto:[EMAIL PROTECTED]] Sent: Wednesday, October 31, 2001 3:35 AM To: MS-Exchange Admin Issues Subject: Prevent sending attachments Hi there, We are using Exchange Server 5.5 SP3 on a Windows NT Server 4.0 SP6. Clients are using Outlook 97. Is there a way to prevent users from sending attachment of a specific filetype ? For instance *.mpeg, *.avi an so on ? Both internal and external mail. Regards, Vlastimil Schart Arcus ASA List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at:http://www.sunbelt-software.com/exchange_list_charter.htmList Charter and FAQ at:http://www.sunbelt-software.com/exchange_list_charter.htmList Charter and FAQ at:http://www.sunbelt-software.com/exchange_list_charter.htmList Charter and FAQ at:http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm
RE: Prevent sending attachments
Title: Message Paul, this thing is turned on :-) I got your first message about Antigen the second after I sent my 2 pennies worth!! -Original Message-From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]Sent: 31 October 2001 15:01To: MS-Exchange Admin IssuesSubject: RE: Prevent sending attachments Hello ... is this thing on ?? Antigen http://www.sybari.com/products/antigen_exchange.asp can do this for exchange. If someone sends you an mp3 file or an exe and they rename it, it will still pick it up because itchecks the attachments based on extension and file type. -Original Message-From: Robin Lawrie [mailto:[EMAIL PROTECTED]]Sent: 31 October 2001 14:47To: MS-Exchange Admin IssuesSubject: RE: Prevent sending attachments Definitely. It's all too easy to change the extension of a file so it's allowed through a virus scanner/mail management software when it shouldn't be, and then renamed at the other end. We have a similar problem on our file server. We've prohibited people from saving particular files, such as mp3, but they can all bypass it by changing the extension of the file to .zip or .doc. -Original Message-From: Snook, Kevin S (ITD) [mailto:[EMAIL PROTECTED]]Sent: 31 October 2001 14:50To: MS-Exchange Admin IssuesSubject: RE: Prevent sending attachments Why not? -Original Message-From: Martin Blackstone [mailto:[EMAIL PROTECTED]]Sent: 31 October 2001 13:44To: MS-Exchange Admin IssuesSubject: RE: Prevent sending attachments What do you mean? Something that would block a .EXE file even if the extension was changed to .XXX? H.interesting. -Original Message-From: MHR(Michael Ross) [mailto:[EMAIL PROTECTED]] Sent: Wednesday, October 31, 2001 5:36 AMTo: MS-Exchange Admin IssuesSubject: RE: Prevent sending attachments NAV for Exchange can do this with a registry tweak.. Its in the read me. What id like is software that filters file types without using extentions. -Original Message- From: Martin Blackstone [mailto:[EMAIL PROTECTED]] Sent: Wednesday, October 31, 2001 7:35 AM To: MS-Exchange Admin Issues Subject: RE: Prevent sending attachments Your Exchange aware Antivirus SW should be able to do this. What are you using? -Original Message- From: Vlastimil Schart [mailto:[EMAIL PROTECTED]] Sent: Wednesday, October 31, 2001 3:35 AM To: MS-Exchange Admin Issues Subject: Prevent sending attachments Hi there, We are using Exchange Server 5.5 SP3 on a Windows NT Server 4.0 SP6. Clients are using Outlook 97. Is there a way to prevent users from sending attachment of a specific filetype ? For instance *.mpeg, *.avi an so on ? Both internal and external mail. Regards, Vlastimil Schart Arcus ASA List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at:http://www.sunbelt-software.com/exchange_list_charter.htmList Charter and FAQ at:http://www.sunbelt-software.com/exchange_list_charter.htmList Charter and FAQ at:http://www.sunbelt-software.com/exchange_list_charter.htmList Charter and FAQ at:http://www.sunbelt-software.com/exchange_list_charter.htmThis email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify us immediately at [EMAIL PROTECTED] and delete this E-mail from your system. Thank you.It is possible for data transmitted by email to be deliberately oraccidentally corrupted or intercepted. For this reason, where thecommunication is by email, the Bank of Ireland Group does not accept any responsibility for any breach of confidence which may arise through the use of this medium.This footnote also confirms that this email message has been swept for the presence of known computer viruses.List Charter and FAQ at:http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm
RE: Prevent sending attachments
Title: Message Seems to me that Trend's Scanmailused to do this but doesn't in it's current version. Something to do with them moving to the MS AVAPI. Think they offer an alternate API for use that may do this. -Original Message-From: Boswell Tim [mailto:[EMAIL PROTECTED]]Sent: Wednesday, October 31, 2001 9:43 AMTo: MS-Exchange Admin IssuesSubject: RE: Prevent sending attachments it's a nice thought.it'd take a hell of a lot of doing thoughyou'd be looking at opening every single attachment that comes through, and analysing it to determine what file type it isCan't see that having a good effect on performance... -Original Message-From: Snook, Kevin S (ITD) [mailto:[EMAIL PROTECTED]]Sent: 31 October 2001 14:50To: MS-Exchange Admin IssuesSubject: RE: Prevent sending attachments Why not? -Original Message-From: Martin Blackstone [mailto:[EMAIL PROTECTED]]Sent: 31 October 2001 13:44To: MS-Exchange Admin IssuesSubject: RE: Prevent sending attachments What do you mean? Something that would block a .EXE file even if the extension was changed to .XXX? H.interesting. -Original Message-From: MHR(Michael Ross) [mailto:[EMAIL PROTECTED]] Sent: Wednesday, October 31, 2001 5:36 AMTo: MS-Exchange Admin IssuesSubject: RE: Prevent sending attachments NAV for Exchange can do this with a registry tweak.. Its in the read me. What id like is software that filters file types without using extentions. -Original Message- From: Martin Blackstone [mailto:[EMAIL PROTECTED]] Sent: Wednesday, October 31, 2001 7:35 AM To: MS-Exchange Admin Issues Subject: RE: Prevent sending attachments Your Exchange aware Antivirus SW should be able to do this. What are you using? -Original Message- From: Vlastimil Schart [mailto:[EMAIL PROTECTED]] Sent: Wednesday, October 31, 2001 3:35 AM To: MS-Exchange Admin Issues Subject: Prevent sending attachments Hi there, We are using Exchange Server 5.5 SP3 on a Windows NT Server 4.0 SP6. Clients are using Outlook 97. Is there a way to prevent users from sending attachment of a specific filetype ? For instance *.mpeg, *.avi an so on ? Both internal and external mail. Regards, Vlastimil Schart Arcus ASA List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at:http://www.sunbelt-software.com/exchange_list_charter.htmList Charter and FAQ at:http://www.sunbelt-software.com/exchange_list_charter.htmList Charter and FAQ at:http://www.sunbelt-software.com/exchange_list_charter.htmList Charter and FAQ at:http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm
RE: Prevent sending attachments
Title: Message
Why
would it "take a hell of a lot of doing though"? Err... isn't every attachment
analysed already??
Kevin
-Original Message-From: Boswell Tim
[mailto:[EMAIL PROTECTED]]Sent: 31 October 2001
14:43To: MS-Exchange Admin IssuesSubject: RE: Prevent
sending attachments
it's
a nice thought.it'd take a hell of a lot of doing thoughyou'd be
looking at opening every single attachment that comes through, and analysing
it to determine what file type it isCan't see that having a good effect on
performance...
-Original Message-From: Snook, Kevin S (ITD)
[mailto:[EMAIL PROTECTED]]Sent: 31 October 2001
14:50To: MS-Exchange Admin IssuesSubject: RE: Prevent
sending attachments
Why not?
-Original Message-From: Martin Blackstone
[mailto:[EMAIL PROTECTED]]Sent: 31 October 2001
13:44To: MS-Exchange Admin IssuesSubject: RE:
Prevent sending attachments
What do you mean? Something that would block a .EXE file even if
the extension was changed to .XXX?
H.interesting.
-Original Message-From:
MHR(Michael Ross) [mailto:[EMAIL PROTECTED]] Sent: Wednesday,
October 31, 2001 5:36 AMTo: MS-Exchange Admin
IssuesSubject: RE: Prevent sending
attachments
NAV for Exchange can do this with a registry tweak.. Its
in the read me. What id like is software that
filters file types without using extentions.
-Original Message- From:
Martin Blackstone [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, October 31, 2001 7:35 AM
To: MS-Exchange Admin Issues Subject: RE: Prevent sending attachments
Your Exchange aware Antivirus SW should be able to do
this. What are you using?
-Original Message- From:
Vlastimil Schart [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, October 31, 2001 3:35 AM
To: MS-Exchange Admin Issues Subject: Prevent sending attachments
Hi there,
We are using Exchange Server 5.5 SP3 on a Windows NT
Server 4.0 SP6. Clients are using Outlook 97. Is there a way to prevent
users from sending attachment of a specific filetype ? For instance
*.mpeg, *.avi an so on ? Both internal and external mail.
Regards, Vlastimil Schart
Arcus ASA
List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm
List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm
List Charter and FAQ
at:http://www.sunbelt-software.com/exchange_list_charter.htmList
Charter and FAQ
at:http://www.sunbelt-software.com/exchange_list_charter.htmList
Charter and FAQ
at:http://www.sunbelt-software.com/exchange_list_charter.htmList
Charter and FAQ
at:http://www.sunbelt-software.com/exchange_list_charter.htm
List Charter and FAQ at:
http://www.sunbelt-software.com/exchange_list_charter.htm
RE: Prevent sending attachments
Title: Message of course, the one problem is that in abusiness environment, ZIP files are rife, and inone sense good, because they keep the attachment size down for work related material. The problem is that if a file is renamed THEN zipped, you've got twice the battle. Can you really risk filtering all ZIP files and losing business critical information to it? Of course, that said, it's quite possible to insert a file as a package in a Word doc, so if someone really wants to get something in, and the person at the other end knows it's coming, there's no easy way of stopping it. Even if your package can look inside ZIP files and filter files from within them, all it sees is a word document, and it goes straight through. -Original Message-From: Mark Kelsay [mailto:[EMAIL PROTECTED]]Sent: 31 October 2001 15:07To: MS-Exchange Admin IssuesSubject: RE: Prevent sending attachments I believe that antigen is aware of this trick and will still remove it. -Original Message-From: Robin Lawrie [mailto:[EMAIL PROTECTED]]Sent: Wednesday, October 31, 2001 9:47 AMTo: MS-Exchange Admin IssuesSubject: RE: Prevent sending attachments Definitely. It's all too easy to change the extension of a file so it's allowed through a virus scanner/mail management software when it shouldn't be, and then renamed at the other end. We have a similar problem on our file server. We've prohibited people from saving particular files, such as mp3, but they can all bypass it by changing the extension of the file to .zip or .doc. -Original Message-From: Snook, Kevin S (ITD) [mailto:[EMAIL PROTECTED]]Sent: 31 October 2001 14:50To: MS-Exchange Admin IssuesSubject: RE: Prevent sending attachments Why not? -Original Message-From: Martin Blackstone [mailto:[EMAIL PROTECTED]]Sent: 31 October 2001 13:44To: MS-Exchange Admin IssuesSubject: RE: Prevent sending attachments What do you mean? Something that would block a .EXE file even if the extension was changed to .XXX? H.interesting. -Original Message-From: MHR(Michael Ross) [mailto:[EMAIL PROTECTED]] Sent: Wednesday, October 31, 2001 5:36 AMTo: MS-Exchange Admin IssuesSubject: RE: Prevent sending attachments NAV for Exchange can do this with a registry tweak.. Its in the read me. What id like is software that filters file types without using extentions. -Original Message- From: Martin Blackstone [mailto:[EMAIL PROTECTED]] Sent: Wednesday, October 31, 2001 7:35 AM To: MS-Exchange Admin Issues Subject: RE: Prevent sending attachments Your Exchange aware Antivirus SW should be able to do this. What are you using? -Original Message- From: Vlastimil Schart [mailto:[EMAIL PROTECTED]] Sent: Wednesday, October 31, 2001 3:35 AM To: MS-Exchange Admin Issues Subject: Prevent sending attachments Hi there, We are using Exchange Server 5.5 SP3 on a Windows NT Server 4.0 SP6. Clients are using Outlook 97. Is there a way to prevent users from sending attachment of a specific filetype ? For instance *.mpeg, *.avi an so on ? Both internal and external mail. Regards, Vlastimil Schart Arcus ASA List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at:http://www.sunbelt-software.com/exchange_list_charter.htmList Charter and FAQ at:http://www.sunbelt-software.com/exchange_list_charter.htmList Charter and FAQ at:http://www.sunbelt-software.com/exchange_list_charter.htmList Charter and FAQ at:http://www.sunbelt-software.com/exchange_list_charter.htmList Charter and FAQ at:http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm
RE: Prevent sending attachments
Title: Message
maybe.
but there's a lot of difference between a cursory look to see what it says it
is, and examining the content to see exactly what's in thereof course, I
could be talking total rubbish!!!
Never
mind, just realised any AV product does this anyway.I am talking rubbish!
ignore me!
-Original Message-From: Snook, Kevin S (ITD)
[mailto:[EMAIL PROTECTED]]Sent: 31 October 2001
15:44To: MS-Exchange Admin IssuesSubject: RE: Prevent
sending attachments
Why
would it "take a hell of a lot of doing though"? Err... isn't every attachment
analysed already??
Kevin
-Original Message-From: Boswell Tim
[mailto:[EMAIL PROTECTED]]Sent: 31 October 2001
14:43To: MS-Exchange Admin IssuesSubject: RE: Prevent
sending attachments
it's a nice thought.it'd take a hell of a lot of doing
thoughyou'd be looking at opening every single attachment that comes
through, and analysing it to determine what file type it isCan't see
that having a good effect on performance...
-Original Message-From: Snook, Kevin S (ITD)
[mailto:[EMAIL PROTECTED]]Sent: 31 October 2001
14:50To: MS-Exchange Admin IssuesSubject: RE:
Prevent sending attachments
Why not?
-Original Message-From: Martin Blackstone
[mailto:[EMAIL PROTECTED]]Sent: 31 October 2001
13:44To: MS-Exchange Admin IssuesSubject: RE:
Prevent sending attachments
What do you mean? Something that would block a .EXE file even if
the extension was changed to .XXX?
H.interesting.
-Original Message-From:
MHR(Michael Ross) [mailto:[EMAIL PROTECTED]] Sent: Wednesday,
October 31, 2001 5:36 AMTo: MS-Exchange Admin
IssuesSubject: RE: Prevent sending
attachments
NAV for Exchange can do this with a registry tweak..
Its in the read me. What id like is software
that filters file types without using extentions.
-Original Message- From: Martin Blackstone [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, October 31, 2001 7:35
AM To: MS-Exchange Admin Issues
Subject: RE: Prevent sending attachments
Your Exchange aware Antivirus SW should be able to do
this. What are you using?
-Original Message- From: Vlastimil Schart [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, October 31, 2001 3:35
AM To: MS-Exchange Admin Issues
Subject: Prevent sending attachments
Hi there,
We are using Exchange Server 5.5 SP3 on a Windows NT
Server 4.0 SP6. Clients are using Outlook 97. Is there a way to
prevent users from sending attachment of a specific filetype ? For
instance *.mpeg, *.avi an so on ? Both internal and external
mail.
Regards, Vlastimil
Schart Arcus ASA
List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm
List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm
List Charter and FAQ
at:http://www.sunbelt-software.com/exchange_list_charter.htmList
Charter and FAQ
at:http://www.sunbelt-software.com/exchange_list_charter.htmList
Charter and FAQ
at:http://www.sunbelt-software.com/exchange_list_charter.htmList
Charter and FAQ
at:http://www.sunbelt-software.com/exchange_list_charter.htmList
Charter and FAQ
at:http://www.sunbelt-software.com/exchange_list_charter.htm
List Charter and FAQ at:
http://www.sunbelt-software.com/exchange_list_charter.htm
RE: Prevent sending attachments
Title: Message How are you preventing your users from saving these files to your servers? -Original Message-From: Robin Lawrie [mailto:[EMAIL PROTECTED]]Sent: Wednesday, October 31, 2001 8:47 AMTo: MS-Exchange Admin IssuesSubject: RE: Prevent sending attachments Definitely. It's all too easy to change the extension of a file so it's allowed through a virus scanner/mail management software when it shouldn't be, and then renamed at the other end. We have a similar problem on our file server. We've prohibited people from saving particular files, such as mp3, but they can all bypass it by changing the extension of the file to .zip or .doc. -Original Message-From: Snook, Kevin S (ITD) [mailto:[EMAIL PROTECTED]]Sent: 31 October 2001 14:50To: MS-Exchange Admin IssuesSubject: RE: Prevent sending attachments Why not? -Original Message-From: Martin Blackstone [mailto:[EMAIL PROTECTED]]Sent: 31 October 2001 13:44To: MS-Exchange Admin IssuesSubject: RE: Prevent sending attachments What do you mean? Something that would block a .EXE file even if the extension was changed to .XXX? H.interesting. -Original Message-From: MHR(Michael Ross) [mailto:[EMAIL PROTECTED]] Sent: Wednesday, October 31, 2001 5:36 AMTo: MS-Exchange Admin IssuesSubject: RE: Prevent sending attachments NAV for Exchange can do this with a registry tweak.. Its in the read me. What id like is software that filters file types without using extentions. -Original Message- From: Martin Blackstone [mailto:[EMAIL PROTECTED]] Sent: Wednesday, October 31, 2001 7:35 AM To: MS-Exchange Admin Issues Subject: RE: Prevent sending attachments Your Exchange aware Antivirus SW should be able to do this. What are you using? -Original Message- From: Vlastimil Schart [mailto:[EMAIL PROTECTED]] Sent: Wednesday, October 31, 2001 3:35 AM To: MS-Exchange Admin Issues Subject: Prevent sending attachments Hi there, We are using Exchange Server 5.5 SP3 on a Windows NT Server 4.0 SP6. Clients are using Outlook 97. Is there a way to prevent users from sending attachment of a specific filetype ? For instance *.mpeg, *.avi an so on ? Both internal and external mail. Regards, Vlastimil Schart Arcus ASA List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at:http://www.sunbelt-software.com/exchange_list_charter.htmList Charter and FAQ at:http://www.sunbelt-software.com/exchange_list_charter.htmList Charter and FAQ at:http://www.sunbelt-software.com/exchange_list_charter.htmList Charter and FAQ at:http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm
RE: Prevent sending attachments
There are seldom good technological solutions for behavioral problems! -Ed Crowley If people do this -- rename attachments to get past filters -- identify them fire them -Michèle Immigration site: http://LadySun1969.tripod.com Our new 2001 Miata: http://members.cardomain.com/bpituley Tiggercam: http://www.tiggercam.co.uk - Build a man a fire, and he'll be warm for a day. Set a man on fire, and he'll be warm for the rest of his life. -Terry Pratchett. - -Original Message- From: MHR(Michael Ross) [mailto:[EMAIL PROTECTED]] Sent: Wednesday, October 31, 2001 9:27 AM To: MS-Exchange Admin Issues Subject: RE: Prevent sending attachments thats what i want, but currently i cant find software do block it like that. i can block .exe files, but if you send me an exe file renamed to .MSN, that file still comes thru. -Original Message- From: Snook, Kevin S (ITD) [mailto:[EMAIL PROTECTED]] Sent: Wednesday, October 31, 2001 8:50 AM To: MS-Exchange Admin Issues Subject: RE: Prevent sending attachments Why not? -Original Message- From: Martin Blackstone [mailto:[EMAIL PROTECTED]] Sent: 31 October 2001 13:44 To: MS-Exchange Admin Issues Subject: RE: Prevent sending attachments What do you mean? Something that would block a .EXE file even if the extension was changed to .XXX? H.interesting. -Original Message- From: MHR(Michael Ross) [mailto:[EMAIL PROTECTED]] Sent: Wednesday, October 31, 2001 5:36 AM To: MS-Exchange Admin Issues Subject: RE: Prevent sending attachments NAV for Exchange can do this with a registry tweak.. Its in the read me. What id like is software that filters file types without using extentions. -Original Message- From: Martin Blackstone [mailto:[EMAIL PROTECTED]] Sent: Wednesday, October 31, 2001 7:35 AM To: MS-Exchange Admin Issues Subject: RE: Prevent sending attachments Your Exchange aware Antivirus SW should be able to do this. What are you using? -Original Message- From: Vlastimil Schart [mailto:[EMAIL PROTECTED]] Sent: Wednesday, October 31, 2001 3:35 AM To: MS-Exchange Admin Issues Subject: Prevent sending attachments Hi there, We are using Exchange Server 5.5 SP3 on a Windows NT Server 4.0 SP6. Clients are using Outlook 97. Is there a way to prevent users from sending attachment of a specific filetype ? For instance *.mpeg, *.avi an so on ? Both internal and external mail. Regards, Vlastimil Schart Arcus ASA List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm
RE: Prevent sending attachments
Title: Message
Maybe
"ZIP files are rife"in ICL but that's not a normal business environment.
Most of the users I come across can't spell ZAp , I mean Zep, err... I mean Zop.
Attaching a file is about as good as it gets!
Kevin
-Original Message-From: Boswell Tim
[mailto:[EMAIL PROTECTED]]Sent: 31 October 2001
15:19To: MS-Exchange Admin IssuesSubject: RE: Prevent
sending attachments
of
course, the one problem is that in abusiness environment, ZIP files are
rife, and inone sense good, because they keep the attachment size down
for work related material. The problem is that if a file is renamed THEN
zipped, you've got twice the battle. Can you really risk filtering all ZIP
files and losing business critical information to it?
Of
course, that said, it's quite possible to insert a file as a package in a Word
doc, so if someone really wants to get something in, and the person at the
other end knows it's coming, there's no easy way of stopping it. Even if your
package can look inside ZIP files and filter files from within them, all it
sees is a word document, and it goes straight through.
-Original Message-From: Mark Kelsay
[mailto:[EMAIL PROTECTED]]Sent: 31 October 2001
15:07To: MS-Exchange Admin IssuesSubject: RE: Prevent
sending attachments
I
believe that antigen is aware of this trick and will still remove
it.
-Original Message-From: Robin Lawrie
[mailto:[EMAIL PROTECTED]]Sent: Wednesday, October 31,
2001 9:47 AMTo: MS-Exchange Admin IssuesSubject: RE:
Prevent sending attachments
Definitely. It's all too easy to change the extension of a file so
it's allowed through a virus scanner/mail management software when it
shouldn't be, and then renamed at the other end.
We have a similar problem on our file server. We've prohibited
people from saving particular files, such as mp3, but they can all bypass
it by changing the extension of the file to .zip or
.doc.
-Original Message-From: Snook, Kevin S (ITD)
[mailto:[EMAIL PROTECTED]]Sent: 31 October 2001
14:50To: MS-Exchange Admin IssuesSubject: RE:
Prevent sending attachments
Why not?
-Original Message-From: Martin Blackstone
[mailto:[EMAIL PROTECTED]]Sent: 31 October
2001 13:44To: MS-Exchange Admin IssuesSubject:
RE: Prevent sending attachments
What do you mean? Something that would block a .EXE file even
if the extension was changed to .XXX?
H.interesting.
-Original Message-From:
MHR(Michael Ross) [mailto:[EMAIL PROTECTED]] Sent:
Wednesday, October 31, 2001 5:36 AMTo: MS-Exchange Admin
IssuesSubject: RE: Prevent sending
attachments
NAV for Exchange can do this with a registry tweak..
Its in the read me. What id like is software
that filters file types without using extentions.
-Original Message- From: Martin Blackstone [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, October 31, 2001 7:35
AM To: MS-Exchange Admin Issues
Subject: RE: Prevent sending attachments
Your Exchange aware Antivirus SW should be able to
do this. What are you using?
-Original Message- From: Vlastimil Schart [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, October 31, 2001 3:35
AM To: MS-Exchange Admin Issues
Subject: Prevent sending attachments
Hi there,
We are using Exchange Server 5.5 SP3 on a Windows NT
Server 4.0 SP6. Clients are using Outlook 97. Is there a way to
prevent users from sending attachment of a specific filetype ? For
instance *.mpeg, *.avi an so on ? Both internal and external
mail.
Regards, Vlastimil
Schart Arcus ASA
List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm
List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm
List Charter and FAQ
at:http://www.sunbelt-software.com/exchange_list_charter.htmList
Charter and FAQ
at:http://www.sunbelt-software.com/exchange_list_charter.htmList
Charter and FAQ
at:http://www.sunbelt-software.com/exchange_list_charter.htmList
Charter and FAQ
at:http://www.sunbelt-software.com/exchange_list_charter.htmList
Charter and FAQ
at:http://www.sunbelt-software.com/exchange_list_charter.htmList
Charter and FAQ
at:http://www.sunbelt-software.com/exchange_list_charter.htm
List Charter and FAQ at:
http://w
RE: Prevent sending attachments
Title: Message Currently trialling two pieces of software. One is FileScreen 2000 and the other one is PowerExpert ST from PowerQuest ( http://www.powerquest.com/powerexpertst/) -Original Message-From: Blake R. Fowkes [mailto:[EMAIL PROTECTED]]Sent: 31 October 2001 15:17To: MS-Exchange Admin IssuesSubject: RE: Prevent sending attachments How are you preventing your users from saving these files to your servers? -Original Message-From: Robin Lawrie [mailto:[EMAIL PROTECTED]]Sent: Wednesday, October 31, 2001 8:47 AMTo: MS-Exchange Admin IssuesSubject: RE: Prevent sending attachments Definitely. It's all too easy to change the extension of a file so it's allowed through a virus scanner/mail management software when it shouldn't be, and then renamed at the other end. We have a similar problem on our file server. We've prohibited people from saving particular files, such as mp3, but they can all bypass it by changing the extension of the file to .zip or .doc. -Original Message-From: Snook, Kevin S (ITD) [mailto:[EMAIL PROTECTED]]Sent: 31 October 2001 14:50To: MS-Exchange Admin IssuesSubject: RE: Prevent sending attachments Why not? -Original Message-From: Martin Blackstone [mailto:[EMAIL PROTECTED]]Sent: 31 October 2001 13:44To: MS-Exchange Admin IssuesSubject: RE: Prevent sending attachments What do you mean? Something that would block a .EXE file even if the extension was changed to .XXX? H.interesting. -Original Message-From: MHR(Michael Ross) [mailto:[EMAIL PROTECTED]] Sent: Wednesday, October 31, 2001 5:36 AMTo: MS-Exchange Admin IssuesSubject: RE: Prevent sending attachments NAV for Exchange can do this with a registry tweak.. Its in the read me. What id like is software that filters file types without using extentions. -Original Message- From: Martin Blackstone [mailto:[EMAIL PROTECTED]] Sent: Wednesday, October 31, 2001 7:35 AM To: MS-Exchange Admin Issues Subject: RE: Prevent sending attachments Your Exchange aware Antivirus SW should be able to do this. What are you using? -Original Message- From: Vlastimil Schart [mailto:[EMAIL PROTECTED]] Sent: Wednesday, October 31, 2001 3:35 AM To: MS-Exchange Admin Issues Subject: Prevent sending attachments Hi there, We are using Exchange Server 5.5 SP3 on a Windows NT Server 4.0 SP6. Clients are using Outlook 97. Is there a way to prevent users from sending attachment of a specific filetype ? For instance *.mpeg, *.avi an so on ? Both internal and external mail. Regards, Vlastimil Schart Arcus ASA List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at:http://www.sunbelt-software.com/exchange_list_charter.htmList Charter and FAQ at:http://www.sunbelt-software.com/exchange_list_charter.htmList Charter and FAQ at:http://www.sunbelt-software.com/exchange_list_charter.htmList Charter and FAQ at:http://www.sunbelt-software.com/exchange_list_charter.htmList Charter and FAQ at:http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm
RE: Prevent sending attachments
I fail to see the point in doing this as the attachment will not execute in the OS with an odd extension. As soon as the recipient runs the attachment they will get an error message about the extension not having a valid application registered. I use Trend to do the trapping and write th attachments to a shared directory on my machine. I've noticed though that if a virus file comes in as an .exe, it is dumped on my machine without being scanned, and my Vet antivirus then scans it and fixes the file. In other words, we are using MAPI mode scanning and the attachment blocking occurs before the scanner checks the message. Running Ex5.5 sp3 on nt4 sp6a I suppose I'll have to get around to putting SP4 on at some stage but I'm a great believer in If it ain't broke, don't fix it cheers Wayne Hanks Systems Administrator Paterson Ord Minnett Ph 08 9263 1114 fax 08 9325 1086 Don't Panic -Douglas Adams The Hitchikers Guide to the Galaxy -Original Message- From: Boswell Tim [mailto:[EMAIL PROTECTED]] Sent: Wednesday, 31 October 2001 22:43 To: MS-Exchange Admin Issues Subject: RE: Prevent sending attachments it's a nice thought.it'd take a hell of a lot of doing thoughyou'd be looking at opening every single attachment that comes through, and analysing it to determine what file type it isCan't see that having a good effect on performance... -Original Message- From: Snook, Kevin S (ITD) [mailto:[EMAIL PROTECTED]] Sent: 31 October 2001 14:50 To: MS-Exchange Admin Issues Subject: RE: Prevent sending attachments Why not? -Original Message- From: Martin Blackstone [mailto:[EMAIL PROTECTED]] Sent: 31 October 2001 13:44 To: MS-Exchange Admin Issues Subject: RE: Prevent sending attachments What do you mean? Something that would block a .EXE file even if the extension was changed to .XXX? H.interesting. -Original Message- From: MHR(Michael Ross) [mailto:[EMAIL PROTECTED]] Sent: Wednesday, October 31, 2001 5:36 AM To: MS-Exchange Admin Issues Subject: RE: Prevent sending attachments NAV for Exchange can do this with a registry tweak.. Its in the read me. What id like is software that filters file types without using extentions. -Original Message- From: Martin Blackstone [ mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] ] Sent: Wednesday, October 31, 2001 7:35 AM To: MS-Exchange Admin Issues Subject: RE: Prevent sending attachments Your Exchange aware Antivirus SW should be able to do this. What are you using? -Original Message- From: Vlastimil Schart [ mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] ] Sent: Wednesday, October 31, 2001 3:35 AM To: MS-Exchange Admin Issues Subject: Prevent sending attachments Hi there, We are using Exchange Server 5.5 SP3 on a Windows NT Server 4.0 SP6. Clients are using Outlook 97. Is there a way to prevent users from sending attachment of a specific filetype ? For instance *.mpeg, *.avi an so on ? Both internal and external mail. Regards, Vlastimil Schart Arcus ASA List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm
