Preferred Member from US
joined:May 6, 2004
I have a situation where a client was on an old hosting system. They moved to a new cpanel hosting system.
They have an internal AIX based server that was using SMTP to send emails to people in the office with attached PDFs. That worked until we moved to the new hosting.
Cpanel was bouncing the emails because the AIX sendmail was sending it as Root@localmachinename.domain.local. I don't believe that the dns can be used to authenticate the origin of the emails in that case.
My opinion is that cpanel was rightly refusing these emails. We can't do a mail relay through our domain because cpanel requires a user id/pw verification.
Am I correct in assuming that emails sent this way will be undeliverable to a certain number of recipients?
I did find a solution where we could set up an email relay with a service that will authentic based on the static ip of the internal server. That would work.
The enterprise system vendor is claiming that the problem is with our hosting.. I'm contending that the problem is that the way they are sending the emails from the aix smtp not showing as a domain that can be reversed in the dns will result in a lot of the emails bouncing.
I'd appreciate any thoughts.