Bounce replies are not coming back through relay
in [Postfix]
|
Prev: (still same spam problem) Pop-Before Smtpd question and also canyou quicky check the log file for issues?
Next: Fast 5xx-exit before HELO is just a temporary failure?
From: "Masao Garcia" on 3 Apr 2010 09:24 Wietse, Okay, I think I know what the problem is. Our reply-to addresses are for a domain that's not handled (yet) by our mail servers. We are in the middle of a transition to bringing our e-mail in-house away from an external pop/imap provider but during the transition we'd still like to keep the reply-to domain name the same (we just have forwards set up on our external provider to point to our temporary e-mail addresses). From looking at the logs, the bounce is going to our provider's MX server and stops there. If I change my reply-to to a domain that is handled by my relay then I get the bounce message back. So I guess my question is now, will I have to wait until I change the MX record to point to my relay before the bounce messages come in or is there a way to set up something on my external provider's side to forward the bounces to my relay? From my limited understanding of how e-mail servers work, I'm thinking I'll have to wait until I change the MX info, right?
From: Wietse Venema on 3 Apr 2010 09:36 Masao Garcia: > Wietse, > > Okay, I think I know what the problem is. Our reply-to addresses are for a > domain that's not handled (yet) by our mail servers. We are in the middle > of a transition to bringing our e-mail in-house away from an external > pop/imap provider but during the transition we'd still like to keep the > reply-to domain name the same (we just have forwards set up on our external > provider to point to our temporary e-mail addresses). From looking at the > logs, the bounce is going to our provider's MX server and stops there. If I > change my reply-to to a domain that is handled by my relay then I get the > bounce message back. > So I guess my question is now, will I have to wait until I change the MX > record to point to my relay before the bounce messages come in or is there a > way to set up something on my external provider's side to forward the > bounces to my relay? From my limited understanding of how e-mail servers > work, I'm thinking I'll have to wait until I change the MX info, right? DNS records have a "time to live" (TTL) attribute, which specifies how long a remote DNS server may use the information. When you change DNS for your mail domain, it will take at least one TTL before all the old DNS information has expired. Therefore, both the old AND new mail server must handle mail for your domain for at least one TTL. Wietse
From: Larry Stone on 3 Apr 2010 10:02
On 4/3/10 8:24 AM, Masao Garcia at masaog(a)fshac.com wrote: > Okay, I think I know what the problem is. Our reply-to addresses are for a > domain that's not handled (yet) by our mail servers. We are in the middle > of a transition to bringing our e-mail in-house away from an external > pop/imap provider but during the transition we'd still like to keep the > reply-to domain name the same (we just have forwards set up on our external > provider to point to our temporary e-mail addresses). From looking at the > logs, the bounce is going to our provider's MX server and stops there. If I > change my reply-to to a domain that is handled by my relay then I get the > bounce message back. Once mail leaves your server, any bounce message generated by a downstream server and sent back to you is "just another" piece of Internet mail and goes to wherever mail is received for your address. There is nothing special about a bounce message that would make the downstream server send it back to the server that sent it the message. -- Larry Stone lstone19(a)stonejongleux.com http://www.stonejongleux.com/ |