RE: Mail Relay [7:45144]
Ok guys, thx to all for ur help. I think I got the picture. Regards. Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=45341t=45144 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: Mail Relay [7:45144]
Nobody knows ?? Can anyone tell me what is a mail relay for ?? -- In a typical mail flow, a source mail client sends message to its mail server. This mai server then directs the message to its nearest mail relay, then to next mail relay, then to the next-next ... until the message reaches the mail server at the other end to be delivered to the destination mail client. -- I know it is not a Cisco issue, but for me it is related to the fact that I am only studying cisco stuff and therefore do not know anything about those kind of Microsoft things. --- Actually it's not Microsoft or whatever thing, but should be called SMTP thing. However, the majority of mail relay boxes out there implement their relay job running sendmail, an integrated GNU software found in every Unix machine including Linux of course. Maintaining sendmail is challenging, but very rewarding. You can start by reading DNS BIND and Sendmail of O'Reilly, then jumping to Sendmail Theory Practice of someone I don't recall the name right now. - Hope it helps little bit. Regards, Victor Tran. Santa Clara County ISD. __ Do You Yahoo!? Yahoo! - Official partner of 2002 FIFA World Cup http://fifaworldcup.yahoo.com Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=45387t=45144 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: Mail Relay [7:45144]
Hi, To my knowledge, Mail Relay is SMTP server forwording the email which source don't belong to its client or domain. For example, [EMAIL PROTECTED] want to send mail to his friend. By default, [EMAIL PROTECTED] require to specify its STMP server under abc.com domain ie SMTP server under abc.com domain. If [EMAIL PROTECTED] specify its SMTP server as xxx.def.com and xxx.def.com SMTP server allow this email to forward its to global interenet, then xxx.def.com is doing mail relay... In conclusion, all the email client in the world can send mail to their friend as long as they specific their SMTP server as xxx.def.com...which causing spamming... Thus, to prevent mail relay, SMTP server should check the source domain before forwarding the email out... Do correct me if i am wrong. Rgds, Sam -Original Message- From: Viet Tran [mailto:[EMAIL PROTECTED]] Sent: Thursday, May 30, 2002 4:19 AM To: [EMAIL PROTECTED] Subject: RE: Mail Relay [7:45144] Nobody knows ?? Can anyone tell me what is a mail relay for ?? -- In a typical mail flow, a source mail client sends message to its mail server. This mai server then directs the message to its nearest mail relay, then to next mail relay, then to the next-next ... until the message reaches the mail server at the other end to be delivered to the destination mail client. -- I know it is not a Cisco issue, but for me it is related to the fact that I am only studying cisco stuff and therefore do not know anything about those kind of Microsoft things. --- Actually it's not Microsoft or whatever thing, but should be called SMTP thing. However, the majority of mail relay boxes out there implement their relay job running sendmail, an integrated GNU software found in every Unix machine including Linux of course. Maintaining sendmail is challenging, but very rewarding. You can start by reading DNS BIND and Sendmail of O'Reilly, then jumping to Sendmail Theory Practice of someone I don't recall the name right now. - Hope it helps little bit. Regards, Victor Tran. Santa Clara County ISD. __ Do You Yahoo!? Yahoo! - Official partner of 2002 FIFA World Cup http://fifaworldcup.yahoo.com Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=45406t=45144 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: Mail Relay [7:45144]
Nobody knows ?? Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=45258t=45144 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Mail Relay [7:45144]
I think mail relays are to use any mail server to direct your mail on it's final destination. Just like you can use any DNS server on the internet to answer a query, you could send your smtp message to a open relay server to send your mail, especially if you didn't have a server on your network. richard dumoulin wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... Can anyone tell me what is a mail relay for ?? I know it is not a Cisco issue, but for me it is related to the fact that I am only studying cisco stuff and therefore do not know anything about those kind of Microsoft things. Regards. Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=45262t=45144 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: Mail Relay [7:45144]
Richard, I assume no one responded since it's not really on topic for the group. A mail relay isn't a Microsoft thing. It's basically any server (MS, UNIX, etc.) that sends mail to another server. Open relays, or mail servers that don't restrict who can send mail through them, are a huge problem on the Internet since they're widely used for spam purposes. HTH, Craig At 12:41 PM 5/28/2002 -0400, you wrote: Nobody knows ?? Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=45263t=45144 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: Mail Relay [7:45144]
nobody knows what? richard dumoulin 05/28/02 12:41PM Nobody knows ?? Confidentiality Disclaimer This email and any files transmitted with it may contain confidential and /or proprietary information in the possession of WellStar Health System, Inc. (WellStar) and is intended only for the individual or entity to whom addressed. This email may contain information that is held to be privileged, confidential and exempt from disclosure under applicable law. If the reader of this message is not the intended recipient, you are hereby notified that any unauthorized access, dissemination, distribution or copying of any information from this email is strictly prohibited, and may subject you to criminal and/or civil liability. If you have received this email in error, please notify the sender by reply email and then delete this email and its attachments from your computer. Thank you. Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=45265t=45144 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Mail Relay [7:45144]
a mail relay is simply any mail server. Your pc is a mail relay when you send smtp traffic to your upstream mail server. That mail server then relays that traffic by doing an mx lookup on the domain name. That server could be an antivirus/content scanner which could then relay the email to your internal mail server. Just tossing the baton -Patrick Steven A. Ridder 05/28/02 12:52PM I think mail relays are to use any mail server to direct your mail on it's final destination. Just like you can use any DNS server on the internet to answer a query, you could send your smtp message to a open relay server to send your mail, especially if you didn't have a server on your network. richard dumoulin wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... Can anyone tell me what is a mail relay for ?? I know it is not a Cisco issue, but for me it is related to the fact that I am only studying cisco stuff and therefore do not know anything about those kind of Microsoft things. Regards. Confidentiality Disclaimer This email and any files transmitted with it may contain confidential and /or proprietary information in the possession of WellStar Health System, Inc. (WellStar) and is intended only for the individual or entity to whom addressed. This email may contain information that is held to be privileged, confidential and exempt from disclosure under applicable law. If the reader of this message is not the intended recipient, you are hereby notified that any unauthorized access, dissemination, distribution or copying of any information from this email is strictly prohibited, and may subject you to criminal and/or civil liability. If you have received this email in error, please notify the sender by reply email and then delete this email and its attachments from your computer. Thank you. Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=45266t=45144 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: Mail Relay [7:45144]
Hmmm- mail relay is a basic function of most ISP and Web hosting services. Big picture- your DNS name space and map too IP (range) for your SMTP gateway must be listed in or accessible (resolvable) via Global DNS. This allows for the relay downstream toward your exchange server (assuming Microsoft). It all pretty much starts with where your MX (Mail Exchanger) transmit and receive records are pointed and what if any weights are applied in your DNS entries. I have studied this process and actually in the past have had to do a little design work here, but shy of breaking-out the books this is all I can seem to recall @ the moment. Topics for research would be DNS BIND (specifically MX records), Send Mail, and Exchange (specifically where traffic is received). Sorry if this may be too vague Phil -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: Monday, May 27, 2002 12:40 PM To: [EMAIL PROTECTED] Subject: Mail Relay [7:45144] Can anyone tell me what is a mail relay for ?? I know it is not a Cisco issue, but for me it is related to the fact that I am only studying cisco stuff and therefore do not know anything about those kind of Microsoft things. Regards. Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=45298t=45144 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
