[rt-users] RT4 Postfix/Apache Email Return-Path causing issues

[Jernej Zajc]

I would suggest you use postfix canonical maps on the host running RT, regardless whether it sends out mail directly or via a mail relay server (e.g. corporate mail server). This way you rewrite the domain part of the email address to an address with public MX record (... at servername.domain to ... at domain or ... at rt.domain). 


RTFM: 
http://www.postfix.org/ADDRESS_REWRITING_README.html 
http://www.postfix.org/canonical.5.html 


A versatile setup is to relay mail from RT host to corporate mail server. Then it is easy to accept incoming mail via corporate mail server (via public aliases or addresses with subdomain, whichever is more appropriate) which then delivers it to postfix on RT host. 


But there are many ways to skin a cat, this being just one of them. 


Nejc 
----- Original Message -----

From: "James Billington" <jbillington at itsfac.com> 
To: rt-users at lists.bestpractical.com 
Sent: Wednesday, 20 March, 2013 5:55:49 PM 
Subject: [rt-users] RT4 Postfix/Apache Email Return-Path causing issues 



Hello, 

I’m not much of a linux guy, but we’re having an issue with emails coming from RT to external organizations. 

We’re running RT 4.0.10 on CentOS 6.3 with Postfix (MailCommand: sendmailpipe) as the email solution. I mostly followed the install guide and prayed during installation and config. 

We get tickets from some external sources that when they get the autoreply from us they do a reverse lookup domain check on the Return-Path instead of the From or Reply-To address (All three are present). The Return-Path is apache at servername.domain , so the emails get denied since it’s not a valid domain with an external MX record. Then we get the undeliverable message from our external mail servers, complete with the raw header info. 

I searched the gossamer archives but didn’t find anything solid that helped. Maybe I didn’t use the right search terms or something because I imagine this has come up before. How can I fix this? Can I change the Return-Path? Or omit it completely? What are my options here? 

Any help is appreciated. 

Thanks, 


James Billington 
Senior Systems Administrator 
ManTech 

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