<html><head><style type='text/css'>p { margin: 0; }</style></head><body><div style='font-family: Garamond; font-size: 12pt; color: #000000'><span><div style="font-size: 12pt;"><span style="font-size: 12pt;">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). </span><span style="font-size: 12pt;">This way you rewrite the domain part of the email address to an address with public MX record (...@servername.domain to ...@domain or ...@rt.domain).</span></div><div style="font-size: 12pt;"><br></div><div style="font-size: 12pt;">RTFM:</div><div style="font-family: Times; font-size: medium;"><font face="Garamond">http://www.postfix.org/ADDRESS_REWRITING_README.html</font></div><div style="font-family: Times; font-size: medium;"><font face="Garamond">http://www.postfix.org/canonical.5.html</font></div><div style="font-family: Times; font-size: medium;"><font face="Garamond"><br></font></div><div style="font-family: Times; font-size: medium;"><font face="Garamond">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 </font><span style="font-family: Garamond;">public aliases or addresses with subdomain, whichever is more appropriate) which then</span><span style="font-family: Garamond;"> delivers it to postfix on RT host.</span></div><div style="font-family: Times; font-size: medium;"><font face="Garamond"><br></font></div><div style="font-family: Times; font-size: medium;"><font face="Garamond">But there are many ways to skin a cat, this being just one of them.</font></div><div style="font-family: Times; font-size: medium;"><font face="Garamond"><br></font></div><div style="font-family: Times; font-size: medium;"><font face="Garamond">Nejc</font></div></span><br><hr id="zwchr"><div style="color:#000;font-weight:normal;font-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;font-size:12pt;"><b>From: </b>"James Billington" <jbillington@itsfac.com><br><b>To: </b>rt-users@lists.bestpractical.com<br><b>Sent: </b>Wednesday, 20 March, 2013 5:55:49 PM<br><b>Subject: </b>[rt-users] RT4 Postfix/Apache Email Return-Path causing issues<br><br>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif"">Hello,</span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif""> </span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif"">I’m not much of a linux guy, but we’re having an issue with emails coming from RT to external organizations.</span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif""> </span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif"">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.</span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif""> </span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif"">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 <a href="mailto:apache@servername.domain" target="_blank">
apache@servername.domain</a>, 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.</span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif""> </span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif"">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?</span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif""> </span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif"">Any help is appreciated.</span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif""> </span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif"">Thanks,</span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif""> </span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black"> </span></b></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;color:black">James Billington</span></b><span style="font-size:10.0pt;color:black"><br>
Senior Systems Administrator<br>
</span>ManTech</p>
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