I host multiple domains on one server. And on one of the domains i host a client of mine is having his email rejected by another email server. I emailed the administrator of that server with the error message,
Reporting-MTA: dns; mail.rndcomputing.com
X-Postfix-Sender: rfc822; firstname.lastname@example.org
Arrival-Date: Wed, 21 Mar 2007 16:09:58 -0700 (PDT)
Final-Recipient: rfc822; email@example.com
Diagnostic-Code: X-Postfix; host mail.wsnlaw.com[188.8.131.52] said: 550
5.7.1 Requested action not taken: message refused (in reply to end of DATA
He replied with
You need to setup a RDNS record for efaganlaw.com. Currently it comes back as rndcomputing.com so it appears that you are spoofing efaganlaw.com which will cause problems for mail users of efaganlaw.com.
Now currently the DNS for efaganlaw.com points to my web server (which also hosts multipple domains) , and the RDNS for my webserver points to my domain, rndcomputing.com (184.108.40.206)
The MX record for efaganlaw.com points to mail.rndcomputing.com who's RDNS is 220.127.116.11.
Now my question is, how can I have efaganlaw.com's RDNS point to efaganlaw.com when the IP for efaganlaw's RDNS is set to my domain, rndcomputing.com ?