Read the instructions about how to change the SMTP header address on an Exchange Server.
But here is a tough one....
I am in talks with Microsoft Support in India, but they cannot figure it out - even though somebody from their group has accomplished this, before we lost the server.
Our AD/domain server/mail server is "mail.zenRx.com" (single machine) ... leftover from upgrades of a WinServer 2000 Domain Controller with the name "zenRx". The upgrade process slapped the ".com" stuff. However, our public/external domain name is "zenRx.org" and we have nothing to do with public "zenRx.com"
Result: SMTP headers do not match now; even though the Zone File and the PTR entry, etc. was perfectly OK before we rebuilt the machine.
Issue: We cannot make the machine [smtp address] look like zenRx.org for the outgoing mails .... it goes out as zenRx.com. Exchange does not allow the change the address (send connectors, etc.). Do you think, this can be achieved with combination of Exchange configuration along with some DNS to the domain/dns/ad/exchange server; without adding an Edge Transport machine.
All the detailed and relevant information from mxToolbox and message header info has been posted here.http://social.technet.microsoft.com/For ... f5782c5ae/