We are working on putting in a new Exchange 2010 server to replace a 2003 box. The exchange server hosts 13 domains. When we send emails out & look at the headers, it seems to grab random domain names as the sending server. The IP is always correct, but the domain always changes and rarely matches the senders email address' domain.
For example, I sent an email from firstname.lastname@example.org to myself at a external address. In the headers it shows "Received: from EXCHANGE.mydomain.com (mail.anotherdomain.com) [69.xx.xxx.100])
We are having an issue where any email we try to send to someone using McAfee mxlogic.com always gets rejected with a 554 error. We use mailroute.net as a smarthost for outgoing emails, so I'm not sure if the problem is ours or there's. When I contacted them, mailroute said its not their problem. At http://trustedsource.org
, both our external sending IP address and mailroute's don't show any issues, so I'm lost. I don't know if its the new Exchange server, Mailroute, or mxlogic.