RE: Blocking an individual email address
Jim, I would suggest you put an IP number block into your router to deny outgoing SMTP destined to the mailserver she is using. But, frankly your really on legal thin ice here. I'm guessing her manager asked you to do this rather than confronting her directly. Probably because he's a bad manager who is scared of confrontation. The legal problem is that the second you do anything you have just established that your company knew about the mail diversion and chose not to confront her. I can tell you what happens in many of these cases. The employee gets around the block and continues to send mail home. Eventually the lame-brained manager is forced to confront her and tell her to knock it off or she will be fired. She won't stop doing it and she will get fired. Then she will file a wrongful termination lawsuit against you, and in it she will say that she was being singled out because the company knew she was doing this for months and since they didn't confront her directly, they approved what she was doing. You guys will end up losing and your going to pay her a lot of money. The best way to handle the problem is for the company to have clear written guidelines that apply equally to all employees that prohibit this. You have your HR department release a set of these to all employees. Your lamebrained manager then shows the employee the guidelines and says these are the new guidelines, and henceforth if you violate them the penalties are spelled out. Without guidelines a court is going to say that since the company didn't explicitly forbid it, and it wasn't illegal, that the employee had a right to do it. Good luck! I hope you end up figuring out how to block her because nothing teaches better than doing it wrong and getting burned. This will be a good learning experience for you. Just remember that when these lawsuits blow up, that everyone involved in a peripheral way within the company gets terminated, I hope you don't get caught in it. Ted -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of James Csoka Sent: Wednesday, February 15, 2006 7:52 AM To: freebsd-questions@freebsd.org Subject: Blocking an individual email address I am running a FreeBSD 5.4p10 machine at my office. It functions as our firewall and mailserver. I am running Mailscanner, which invokes sendmail when necessary to process mail. Sendmail is not started by defaultMailscanner invokes individual instances of it when it needs to. Here is my problem. I have an employee at my office that is sending work email to her home email address. I need to find a way to block her email address, whether To, From, Cc, Bcc, or whatever, from passing through my mailserver. I have already added a line to /etc/mail/access (in the format [EMAIL PROTECTED] REJECT), and have run makemap hash /etc/mail/access.db /etc/mail/access. I tested this with my personal email address (external to my network), and it had the effect of blocking any email orginating from my personal email to any address at my work, however it does not prevent me from sending emails to this address from a work address, which is the whole point. Does anyone have any ideas? I could tag the address as spam, but I would rather not. There has to be a way to block anyone from sending to a certain email address, I would think. Any help would be appreciated. -Jim ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED] -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.375 / Virus Database: 267.15.10/262 - Release Date: 2/16/2006 ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Blocking an individual email address
Jim Csoka wrote: No...I ran make maps, as well as make install for the blacklist feature, and make restart. However, here is something interesting. When I access my corporate email via openwebmail, it functions as I would expectyou cannot send or receive to the given address. However, when using Outlook Express (internal mail client at work), you can still send mail to the address I am trying to block. Why should this be so? Are you sure Outlook Express is configured to use your FreeBSD server for SMTP? Send an email to yourself using Outlook Express then look at the message source and check the headers to verify which SMTP server is sending the message. -- Ken Stevenson Allen-Myland Inc. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Blocking an individual email address
- Original Message - From: Ken Stevenson [EMAIL PROTECTED] To: Jim Csoka [EMAIL PROTECTED] Cc: freebsd-questions@freebsd.org Sent: Thursday, February 16, 2006 10:31 AM Subject: Re: Blocking an individual email address Jim Csoka wrote: No...I ran make maps, as well as make install for the blacklist feature, and make restart. However, here is something interesting. When I access my corporate email via openwebmail, it functions as I would expectyou cannot send or receive to the given address. However, when using Outlook Express (internal mail client at work), you can still send mail to the address I am trying to block. Why should this be so? Are you sure Outlook Express is configured to use your FreeBSD server for SMTP? Send an email to yourself using Outlook Express then look at the message source and check the headers to verify which SMTP server is sending the message. -- Ken Stevenson Allen-Myland Inc. Yes, I'm sure. It is the incoming and outgoing SMTP server. It's the only one we have. -Jim ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
RE: Blocking an individual email address
Jim Csoka wrote: No...I ran make maps, as well as make install for the blacklist feature, and make restart. However, here is something interesting. When I access my corporate email via openwebmail, it functions as I would expectyou cannot send or receive to the given address. However, when using Outlook Express (internal mail client at work), you can still send mail to the address I am trying to block. Why should this be so? Are you sure Outlook Express is configured to use your FreeBSD server for SMTP? Send an email to yourself using Outlook Express then look at the message source and check the headers to verify which SMTP server is sending the message. -- Ken Stevenson Allen-Myland Inc. Yes, I'm sure. It is the incoming and outgoing SMTP server. It's the only one we have. -Jim ___ Yes that may be the only one you have, but that does not stop the user from configuring their outlook express from using their personal email account at their ISP. To stop this you can add firewall rules to deny all LAN traffic out to ports 25 110 by coding the private LAN ip address range in the rule from option. Since your SMTP service is on the gateway box where the firewall is your outbound port 25 will pass because your using the public ip address or if that is not the case then just add a rule before the deny rule to pass your SMTP LAN ip address. o unsubscribe, send any mail to [EMAIL PROTECTED] ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Blocking an individual email address
- Original Message - From: [EMAIL PROTECTED] To: James Csoka [EMAIL PROTECTED]; Ken Stevenson [EMAIL PROTECTED] Cc: freebsd-questions@freebsd.org Sent: Thursday, February 16, 2006 10:55 AM Subject: RE: Blocking an individual email address Jim Csoka wrote: No...I ran make maps, as well as make install for the blacklist feature, and make restart. However, here is something interesting. When I access my corporate email via openwebmail, it functions as I would expectyou cannot send or receive to the given address. However, when using Outlook Express (internal mail client at work), you can still send mail to the address I am trying to block. Why should this be so? Are you sure Outlook Express is configured to use your FreeBSD server for SMTP? Send an email to yourself using Outlook Express then look at the message source and check the headers to verify which SMTP server is sending the message. -- Ken Stevenson Allen-Myland Inc. Yes, I'm sure. It is the incoming and outgoing SMTP server. It's the only one we have. -Jim ___ Yes that may be the only one you have, but that does not stop the user from configuring their outlook express from using their personal email account at their ISP. To stop this you can add firewall rules to deny all LAN traffic out to ports 25 110 by coding the private LAN ip address range in the rule from option. Since your SMTP service is on the gateway box where the firewall is your outbound port 25 will pass because your using the public ip address or if that is not the case then just add a rule before the deny rule to pass your SMTP LAN ip address. Understood. However, most everyone here in my office (a mortgage company of about 25 people) can barely even spell the word computer much less use one effectively. And, aside from that, I am running these tests from my windows client, so I can verify that it is configured correctly for the purpose of running these tests. Although I wish it were as simple as someone using a different SMTP serverit would make my life easier :P ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
RE: Blocking an individual email address
Jim Csoka wrote: No...I ran make maps, as well as make install for the blacklist feature, and make restart. However, here is something interesting. When I access my corporate email via openwebmail, it functions as I would expectyou cannot send or receive to the given address. However, when using Outlook Express (internal mail client at work), you can still send mail to the address I am trying to block. Why should this be so? Are you sure Outlook Express is configured to use your FreeBSD server for SMTP? Send an email to yourself using Outlook Express then look at the message source and check the headers to verify which SMTP server is sending the message. -- Ken Stevenson Allen-Myland Inc. Yes, I'm sure. It is the incoming and outgoing SMTP server. It's the only one we have. -Jim ___ Yes that may be the only one you have, but that does not stop the user from configuring their outlook express from using their personal email account at their ISP. To stop this you can add firewall rules to deny all LAN traffic out to ports 25 110 by coding the private LAN ip address range in the rule from option. Since your SMTP service is on the gateway box where the firewall is your outbound port 25 will pass because your using the public ip address or if that is not the case then just add a rule before the deny rule to pass your SMTP LAN ip address. Understood. However, most everyone here in my office (a mortgage company of about 25 people) can barely even spell the word computer much less use one effectively. And, aside from that, I am running these tests from my windows client, so I can verify that it is configured correctly for the purpose of running these tests. Although I wish it were as simple as someone using a different SMTP serverit would make my life easier :P ** Have you physically used this offending persons work PC during off hours and investigated just how they have their outlook explorer configured??? ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED] ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Blocking an individual email address
On Thu, 16 Feb 2006 11:27:40 -0500 [EMAIL PROTECTED] wrote: Jim Csoka wrote: No...I ran make maps, as well as make install for the blacklist feature, and make restart. However, here is something interesting. When I access my corporate email via openwebmail, it functions as I would expectyou cannot send or receive to the given address. However, when using Outlook Express (internal mail client at work), you can still send mail to the address I am trying to block. Why should this be so? Are you sure Outlook Express is configured to use your FreeBSD server for SMTP? Send an email to yourself using Outlook Express then look at the message source and check the headers to verify which SMTP server is sending the message. -- Ken Stevenson Allen-Myland Inc. Yes, I'm sure. It is the incoming and outgoing SMTP server. It's the only one we have. -Jim ___ Yes that may be the only one you have, but that does not stop the user from configuring their outlook express from using their personal email account at their ISP. To stop this you can add firewall rules to deny all LAN traffic out to ports 25 110 by coding the private LAN ip address range in the rule from option. Since your SMTP service is on the gateway box where the firewall is your outbound port 25 will pass because your using the public ip address or if that is not the case then just add a rule before the deny rule to pass your SMTP LAN ip address. Understood. However, most everyone here in my office (a mortgage company of about 25 people) can barely even spell the word computer much less use one effectively. And, aside from that, I am running these tests from my windows client, so I can verify that it is configured correctly for the purpose of running these tests. Although I wish it were as simple as someone using a different SMTP serverit would make my life easier :P ** Have you physically used this offending persons work PC during off hours and investigated just how they have their outlook explorer configured??? At what point does this stop being an IS issue and start being a Human Resources issue? (I realize that a company of 25 people probably does not have a Human Resources Department.) A mortgage company handles a lot of private information. The employees need to be trustworthy; and the information needs to be protected. However, the responsibility for protecting company information does not fall solely upon IS. If an employee is sending sensitive information home against company policy, the policy needs to be enforced. The employee should be counseled/educated/corrected and, if necessary, fired. Whereas I think there should be strong IS policies in place, and I applaud the original poster's diligence, a defacto policy of playing cat-and-mouse can be horribly inefficient. Andrew Gould ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Blocking an individual email address....again
To debug this you need to kick up the logging on sendmail, add the loglevel option to your sendmail options in rc.conf: -O LogLevel=80 You will need a loglevel value fairly high, like 80. You can then watch or just look at the sendmail log file: /var/log/maillog And see what is actually happening. You should be aware that there are typically 2 to 3 separate instances of sendmail running passing the mail around. Hope this helps. -Derek At 09:39 AM 2/16/2006, James Csoka wrote: I'm reposting this with some more info.any help would be greatly appreciated. I have a mail server (it also functions as a firewall) running freebsd5.4, with mailscanner, openwebmail, and sendmail. I wish to block an individual email address, but I do not want to mark it as spam. My first solution was to add the blacklist feature to the sendmail.mc file, and recreate the .cf file, which I did. I then added the line To:[EMAIL PROTECTED] REJECT to the /etc/mail/access file, and ran make maps. I also had added the line [EMAIL PROTECTED] REJECT. This then blocked that address from sending email to people on my internal network. When I tested it from outside my network I used openwebmail as a web interface to send email to that address, and it failed. Which was what I wanted. However, from inside my network, using Outlook, you can send email to that address without a problem. It seems as if the access.db is doing it's job. When using openwebmail, the smtp server rejects any attempt to send mail to that address. however, locally, it does not. When i'm sitting in front of my windows client, I can use Outlook and send email to that address without a problem. Does anyone know why via a web interface, the access file rules would apply, yet they would be ignored when sending mail from inside the network using Outlook to send external email? ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED] ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Blocking an individual email address
Okay...I think I answered part of my question. /etc/mail/access only governs mail relaying. Which would mean that of course, it wouldn't accept mail from that address, but would have no problem sending mail to it. Soany ideas on how I can simply block 1 particular email address, without marking it as spam? - Original Message - From: James Csoka [EMAIL PROTECTED] To: freebsd-questions@freebsd.org Sent: Wednesday, February 15, 2006 10:52 AM Subject: Blocking an individual email address I am running a FreeBSD 5.4p10 machine at my office. It functions as our firewall and mailserver. I am running Mailscanner, which invokes sendmail when necessary to process mail. Sendmail is not started by defaultMailscanner invokes individual instances of it when it needs to. Here is my problem. I have an employee at my office that is sending work email to her home email address. I need to find a way to block her email address, whether To, From, Cc, Bcc, or whatever, from passing through my mailserver. I have already added a line to /etc/mail/access (in the format [EMAIL PROTECTED] REJECT), and have run makemap hash /etc/mail/access.db /etc/mail/access. I tested this with my personal email address (external to my network), and it had the effect of blocking any email orginating from my personal email to any address at my work, however it does not prevent me from sending emails to this address from a work address, which is the whole point. Does anyone have any ideas? I could tag the address as spam, but I would rather not. There has to be a way to block anyone from sending to a certain email address, I would think. Any help would be appreciated. -Jim ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED] ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Blocking an individual email address
James Csoka wrote: I am running a FreeBSD 5.4p10 machine at my office. It functions as our firewall and mailserver. I am running Mailscanner, which invokes sendmail when necessary to process mail. Sendmail is not started by defaultMailscanner invokes individual instances of it when it needs to. Here is my problem. I have an employee at my office that is sending work email to her home email address. I need to find a way to block her email address, whether To, From, Cc, Bcc, or whatever, from passing through my mailserver. I have already added a line to /etc/mail/access (in the format [EMAIL PROTECTED] REJECT), and have run makemap hash /etc/mail/access.db /etc/mail/access. I tested this with my personal email address (external to my network), and it had the effect of blocking any email orginating from my personal email to any address at my work, however it does not prevent me from sending emails to this address from a work address, which is the whole point. Does anyone have any ideas? I could tag the address as spam, but I would rather not. There has to be a way to block anyone from sending to a certain email address, I would think. Any help would be appreciated. -Jim I don't mean to be a wise ass but this sounds wrong on so many levels. Why can't she send email to her home email address? If there's a good reason, can't you firmly explain the company policy to her, tell her all mail is logged and that she'll be fired if she continues to violate company policy? Bottom line, if she doesn't care about following company policy, she'll get around any countermeasures you try to employ, one way or the other. -- Ken Stevenson Allen-Myland Inc. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Blocking an individual email address
In the last episode (Feb 15), James Csoka said: Okay...I think I answered part of my question. /etc/mail/access only governs mail relaying. Which would mean that of course, it wouldn't accept mail from that address, but would have no problem sending mail to it. It covers local and outgoing delivery as well. If you add To:[EMAIL PROTECTED]REJECT then no-one will be able to send mail to that user from your site. See http://www.sendmail.org/m4/anti_spam.html#access_db_fine . -- Dan Nelson [EMAIL PROTECTED] ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Blocking an individual email address
On Wed, 2006-02-15 at 15:52, James Csoka wrote: I am running a FreeBSD 5.4p10 machine at my office. It functions as our firewall and mailserver. I am running Mailscanner, which invokes sendmail when necessary to process mail. Sendmail is not started by defaultMailscanner invokes individual instances of it when it needs to. Here is my problem. I have an employee at my office that is sending work email to her home email address. I need to find a way to block her email address, whether To, From, Cc, Bcc, or whatever, from passing through my mailserver. I have already added a line to /etc/mail/access (in the format [EMAIL PROTECTED] REJECT), and have run makemap hash /etc/mail/access.db /etc/mail/access. I tested this with my personal email address (external to my network), and it had the effect of blocking any email orginating from my personal email to any address at my work, however it does not prevent me from sending emails to this address from a work address, which is the whole point. Does anyone have any ideas? I could tag the address as spam, but I would rather not. There has to be a way to block anyone from sending to a certain email address, I would think. Any help would be appreciated. -Jim Jim, Just a thought have you tired adding the address to /etc/aliases and sending the mail to a different address or a back hole? Rob ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Blocking an individual email address
I am running a FreeBSD 5.4p10 machine at my office. It functions as our firewall and mailserver. I am running Mailscanner, which invokes sendmail when necessary to process mail. Sendmail is not started by defaultMailscanner invokes individual instances of it when it needs to. Here is my problem. I have an employee at my office that is sending work email to her home email address. I need to find a way to block her email address, whether To, From, Cc, Bcc, or whatever, from passing through my mailserver. I have already added a line to /etc/mail/access (in the format [EMAIL PROTECTED] REJECT), and have run makemap hash /etc/mail/access.db /etc/mail/access. I tested this with my personal email address (external to my network), and it had the effect of blocking any email orginating from my personal email to any address at my work, however it does not prevent me from sending emails to this address from a work address, which is the whole point. I doubt we know the whole story, but even if you do find a way to make this work what stops her from... - emailing her work to her gmail/hotmail/yahoo account? - copying her email and putting it on a thumb drive? - printing it out and taking it home? If you are trying to stop her from taking work material home then you've got a much bigger problem. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Blocking an individual email address
2006/2/15, Philip Hallstrom [EMAIL PROTECTED]: I am running a FreeBSD 5.4p10 machine at my office. It functions as our firewall and mailserver. I am running Mailscanner, which invokes sendmail when necessary to process mail. Sendmail is not started by defaultMailscanner invokes individual instances of it when it needs to. Here is my problem. I have an employee at my office that is sending work email to her home email address. I need to find a way to block her email address, whether To, From, Cc, Bcc, or whatever, from passing through my mailserver. I have already added a line to /etc/mail/access (in the format [EMAIL PROTECTED] REJECT), and have run makemap hash /etc/mail/access.db /etc/mail/access. I tested this with my personal email address (external to my network), and it had the effect of blocking any email orginating from my personal email to any address at my work, however it does not prevent me from sending emails to this address from a work address, which is the whole point. I doubt we know the whole story, but even if you do find a way to make this work what stops her from... - emailing her work to her gmail/hotmail/yahoo account? - copying her email and putting it on a thumb drive? - printing it out and taking it home? If you are trying to stop her from taking work material home then you've got a much bigger problem. There's also the issue that she can use a webmail to send mail to her house account and joining document there ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Blocking an individual email address
After reading the page you linked to, and looking at the examples, I added the line To:[EMAIL PROTECTED] REJECT (using my personal email), and it had no effect. I can't find any good reason it didn't work, but it fails to prevent me from sending mail from inside my work network to my home address. any ideas? - Original Message - From: Dan Nelson [EMAIL PROTECTED] To: James Csoka [EMAIL PROTECTED] Cc: Freebsd - Questions freebsd-questions@freebsd.org Sent: Wednesday, February 15, 2006 11:12 AM Subject: Re: Blocking an individual email address In the last episode (Feb 15), James Csoka said: Okay...I think I answered part of my question. /etc/mail/access only governs mail relaying. Which would mean that of course, it wouldn't accept mail from that address, but would have no problem sending mail to it. It covers local and outgoing delivery as well. If you add To:[EMAIL PROTECTED] REJECT then no-one will be able to send mail to that user from your site. See http://www.sendmail.org/m4/anti_spam.html#access_db_fine . -- Dan Nelson [EMAIL PROTECTED] ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED] ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Blocking an individual email address
In the last episode (Feb 15), James Csoka said: After reading the page you linked to, and looking at the examples, I added the line To:[EMAIL PROTECTED] REJECT (using my personal email), and it had no effect. I can't find any good reason it didn't work, but it fails to prevent me from sending mail from inside my work network to my home address. I thought To: checks would work on outgoing mail, but it looks like that's not the case. From http://www.sendmail.org/m4/features.html#blacklist_recipients : blacklist_recipients Turns on the ability to block incoming mail for certain recipient usernames, hostnames, or addresses. For example, you can block incoming mail to user nobody, host foo.mydomain.com, or [EMAIL PROTECTED] These specifications are put in the access db as described in the Anti-Spam Configuration Control section later in this document. any ideas? Try posting your question to the comp.mail.sendmail newsgroup; search the archives at http://groups.google.com/group/comp.mail.sendmail first, though. Someone must have wanted to do what you're trying before. -- Dan Nelson [EMAIL PROTECTED] ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Blocking an individual email address
James Csoka [EMAIL PROTECTED] writes: After reading the page you linked to, and looking at the examples, I added the line To:[EMAIL PROTECTED] REJECT (using my personal email), and it had no effect. I can't find any good reason it didn't work, but it fails to prevent me from sending mail from inside my work network to my home address. Maybe putting an alias on the home address? ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Blocking an individual email address
Lowell Gilbert wrote: James Csoka [EMAIL PROTECTED] writes: After reading the page you linked to, and looking at the examples, I added the line To:[EMAIL PROTECTED] REJECT (using my personal email), and it had no effect. I can't find any good reason it didn't work, but it fails to prevent me from sending mail from inside my work network to my home address. Maybe putting an alias on the home address? ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED] cd /etc/mail vi access make maps You probably forgot to 'make maps'. -- Nathan Vidican [EMAIL PROTECTED] Windsor Match Plate Tool Ltd. http://www.wmptl.com/ ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Blocking an individual email address
Date: Wed, 15 Feb 2006 10:52:26 -0500 From: James Csoka [EMAIL PROTECTED] Subject: Blocking an individual email address To: freebsd-questions@freebsd.org Message-ID: [EMAIL PROTECTED] Content-Type: text/plain; charset=iso-8859-1 I am running a FreeBSD 5.4p10 machine at my office. It functions as our firewall and mailserver. I am running Mailscanner, which invokes sendmail when necessary to process mail. Sendmail is not started by defaultMailscanner invokes individual instances of it when it needs to. Here is my problem. I have an employee at my office that is sending work email to her home email address. I need to find a way to block her email address, whether To, From, Cc, Bcc, or whatever, from passing through my mailserver. I have already added a line to /etc/mail/access (in the format [EMAIL PROTECTED] REJECT), and have run makemap hash /etc/mail/access.db /etc/mail/access. I tested this with my personal email address (external to my network), and it had the effect of blocking any email orginating from my personal email to any address at my work, however it does not prevent me from sending emails to this address from a work address, which is the whole point. Does anyone have any ideas? I could tag the address as spam, but I would rather not. There has to be a way to block anyone from sending to a certain email address, I would think. Any help would be appreciated. -Jim I am not a sendmail expert, but try adding this line to your sendmail.mc: FEATURE(blacklist_recipients) My understanding is that this causes blacklisted email addresses to be applied to both sender (which you verified, sending from your home personal address) and recipients (which you're trying to accomplish, blocking the employee's address when designated as a To:/Cc:/Bcc: recipient). Add that line, remembering to re-create your sendmail.cf, restart sendmail, and try again. Jim ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Blocking an individual email address
James Long wrote: Date: Wed, 15 Feb 2006 10:52:26 -0500 From: James Csoka [EMAIL PROTECTED] Subject: Blocking an individual email address To: freebsd-questions@freebsd.org Message-ID: [EMAIL PROTECTED] Content-Type: text/plain; charset=iso-8859-1 I am running a FreeBSD 5.4p10 machine at my office. It functions as our firewall and mailserver. I am running Mailscanner, which invokes sendmail when necessary to process mail. Sendmail is not started by defaultMailscanner invokes individual instances of it when it needs to. Here is my problem. I have an employee at my office that is sending work email to her home email address. I need to find a way to block her email address, whether To, From, Cc, Bcc, or whatever, from passing through my mailserver. I have already added a line to /etc/mail/access (in the format [EMAIL PROTECTED] REJECT), and have run makemap hash /etc/mail/access.db /etc/mail/access. I tested this with my personal email address (external to my network), and it had the effect of blocking any email orginating from my personal email to any address at my work, however it does not prevent me from sending emails to this address from a work address, which is the whole point. Does anyone have any ideas? I could tag the address as spam, but I would rather not. There has to be a way to block anyone from sending to a certain email address, I would think. Any help would be appreciated. -Jim I am not a sendmail expert, but try adding this line to your sendmail.mc: FEATURE(blacklist_recipients) My understanding is that this causes blacklisted email addresses to be applied to both sender (which you verified, sending from your home personal address) and recipients (which you're trying to accomplish, blocking the employee's address when designated as a To:/Cc:/Bcc: recipient). Add that line, remembering to re-create your sendmail.cf, restart sendmail, and try again. Jim Well, if you want a positive solution, you could just dismiss her. It would seem that you have good cause. Simply document that you have instructed her to cease abusing the email system. Then when she does violate your orders, terminate her. -- Gerard ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Blocking an individual email address
If you installed MailScanner from the ports, look to change: /usr/local/etc/MailScanner/rules/spam.blacklist.rules You can specify To, and From rules, there, maybe more. I am no expert. Hope this helps, -Derek At 09:52 AM 2/15/2006, James Csoka wrote: I am running a FreeBSD 5.4p10 machine at my office. It functions as our firewall and mailserver. I am running Mailscanner, which invokes sendmail when necessary to process mail. Sendmail is not started by defaultMailscanner invokes individual instances of it when it needs to. Here is my problem. I have an employee at my office that is sending work email to her home email address. I need to find a way to block her email address, whether To, From, Cc, Bcc, or whatever, from passing through my mailserver. I have already added a line to /etc/mail/access (in the format [EMAIL PROTECTED] REJECT), and have run makemap hash /etc/mail/access.db /etc/mail/access. I tested this with my personal email address (external to my network), and it had the effect of blocking any email orginating from my personal email to any address at my work, however it does not prevent me from sending emails to this address from a work address, which is the whole point. Does anyone have any ideas? I could tag the address as spam, but I would rather not. There has to be a way to block anyone from sending to a certain email address, I would think. Any help would be appreciated. -Jim ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED] ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Blocking an individual email address
James Csoka wrote: After reading the page you linked to, and looking at the examples, I added the line To:[EMAIL PROTECTED] REJECT (using my personal email), and it had no effect. I can't find any good reason it didn't work, but it fails to prevent me from sending mail from inside my work network to my home address. Do you do a make access.db or make all afterwards to rebuild the database? Maybe try restarting sendmail (make restart) and see whether /var/log/maillog says something interesting about that file or something else that might be helpful? (Does a logfile that no-one reads make any noise? :-) -- -Chuck ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Blocking an individual email address
No...I ran make maps, as well as make install for the blacklist feature, and make restart. However, here is something interesting. When I access my corporate email via openwebmail, it functions as I would expectyou cannot send or receive to the given address. However, when using Outlook Express (internal mail client at work), you can still send mail to the address I am trying to block. Why should this be so? - Original Message - From: Nathan Vidican [EMAIL PROTECTED] To: freebsd-questions@freebsd.org Cc: [EMAIL PROTECTED] Sent: Wednesday, February 15, 2006 5:00 PM Subject: Re: Blocking an individual email address Lowell Gilbert wrote: James Csoka [EMAIL PROTECTED] writes: After reading the page you linked to, and looking at the examples, I added the line To:[EMAIL PROTECTED] REJECT (using my personal email), and it had no effect. I can't find any good reason it didn't work, but it fails to prevent me from sending mail from inside my work network to my home address. Maybe putting an alias on the home address? ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED] cd /etc/mail vi access make maps You probably forgot to 'make maps'. -- Nathan Vidican [EMAIL PROTECTED] Windsor Match Plate Tool Ltd. http://www.wmptl.com/ ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED] ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
