Reporting-MTA: dns;mailbox.here.com
Received-From-MTA: dns;exchange.mynetwork.lcl
Arrival-Date: Thu, 15 Nov 2007 15:57:45 -0500
This is what I get back from the account that I've sent from at work.
Again, there are domains on the box that are having no issues. There has to be something in the configuration. I've added accounts for myself to all of the domains. I now know exactly which ones are having issues getting mail from outside and which are not.