Exchange 2007 relay from sendmail, message "Undelivered". Possible reasons?
- by garlicman
Note: This is my re-post from Stackoverflow.
I've been messing with a test environment for security purposes where a DMZ RHEL5 sendmail server is used as a relay for an Exchange 2007 server. Exchange is working in the environment, I have Vista and XP VMs using Outlook on the Domain to send e-mail to each other. I've been trying to simulate an…