If an SMTP host accepts a message from a client or another SMTP server for ultimate delivery to an e-mail domain for which it is not authorized to accept mail, and then it forwards that mail to an appropriate SMTP server for that domain, then that SMTP host is relaying.
Ed Crowley MCSE+Internet MVP Freelance E-Mail Philosopher Protecting the world from PSTs and Bricked Backups!T -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jason Clishe Sent: Tuesday, November 11, 2003 4:21 PM To: Exchange Discussions Subject: RE: AOL is Blocking Mail from My Exchange Server 5.5 I give up. Jason -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jim Underwood Sent: Tuesday, November 11, 2003 6:08 PM To: Exchange Discussions Subject: RE: AOL is Blocking Mail from My Exchange Server 5.5 Thanks to everyone who contributed to this thread. I certainly have learned a lot. I see that I had an incorrect understanding of "relay". I thought "relay" was defined as one SMTP server sending mail to another server for purposes of forwarding that mail on to its final destination. I did not consider the connection between a SMTP server and an email client as a relay. Thanks for the clarification. Best Regards, JMU Jim Underwood -----Original Message----- From: AliAdmin [mailto:[EMAIL PROTECTED] Sent: Tuesday, November 11, 2003 09:13 To: Exchange Discussions Subject: Re: AOL is Blocking Mail from My Exchange Server 5.5 I think there is confusion is over closed Relay and an open Relay. If you want you mail to go anywhere outside you domain then it must relay, but if you must authenticate to do it then it is a closed relay. Earthlink obviously operate a closed relay, as they should :) Later Ali ----- Original Message ----- From: "Jason Clishe" <[EMAIL PROTECTED]> To: "Exchange Discussions" <[EMAIL PROTECTED]> Sent: Tuesday, November 11, 2003 1:11 PM Subject: RE: AOL is Blocking Mail from My Exchange Server 5.5 Exactly my point. Jim is saying it's NOT relaying if the client authenticates, and I'm saying otherwise. If the SMTP server doesn't own the domain you're sending to, then it acts as a relay, period. Regardless of how the client connects. Jason -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Ed Crowley [MVP] Sent: Monday, November 10, 2003 10:58 PM To: Exchange Discussions Subject: RE: AOL is Blocking Mail from My Exchange Server 5.5 Oh, it doesn't? When a POP client sends mail using SMTP, it is relaying off the server it contacts. Ed Crowley MCSE+Internet MVP Freelance E-Mail Philosopher Protecting the world from PSTs and Bricked Backups!T -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jason Clishe Sent: Monday, November 10, 2003 3:24 AM To: Exchange Discussions Subject: RE: AOL is Blocking Mail from My Exchange Server 5.5 When a mail server accepts mail for a domain external to itself, and forwards mail on to that domain, it most certainly is a relay. The term "relay" has nothing to do with how a client connects to the server. Jason > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] Behalf Of Jim Underwood > Sent: Monday, November 10, 2003 1:53 AM > To: Exchange Discussions > Subject: RE: AOL is Blocking Mail from My Exchange Server 5.5 > > > Jason, > > By authenticated client connection. When a client connects to the > SMTP server, it is NOT relay. The client must provide username and > PW. > > Best Regards, > JMU > > Jim Underwood > > > > > -----Original Message----- > From: Jason Clishe [mailto:[EMAIL PROTECTED] > Sent: Monday, November 10, 2003 00:51 > To: Exchange Discussions > Subject: RE: AOL is Blocking Mail from My Exchange Server 5.5 > > > Ummm, if Earthlink didn't relay, than how would any Earthlink > subscriber send their email? > > Jason > _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Web Interface: http://intm-dl.sparklist.com/cgi-bin/lyris.pl?enter=exchange&text_mode=&; lang=english To unsubscribe: mailto:[EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED] _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Web Interface: http://intm-dl.sparklist.com/cgi-bin/lyris.pl?enter=exchange&text_mode=&lang =english To unsubscribe: mailto:[EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED] _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Web Interface: http://intm-dl.sparklist.com/cgi-bin/lyris.pl?enter=exchange&text_mode=&lang=english To unsubscribe: mailto:[EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED]
