A customer of mine has a SBS2008 box set up that's been running for a few years, recently they added a 2nd domain to their business. This is something I've set up several times in SBS2003, and worked flawlessly.
I set up the domain, pointed the MX records to the SBS2008 box, In Exchange Management Opened up Organization > Hub Transport > Added new domain as an Accepted Domain. Opened up Created a new Email Address Policy, priority 2 (main is priority
1), added the domain.
Incoming email works just fine. But if I send an external email nothing happens. No rejection, No bounce-back... it's like I never sent it. Tested to 3 external hosts, Hotmail, Yahoo, and my own personal Exchange. However, if I send
a message from external to the 2nd domain, it works fine. I'm even able to reply to the external from the 2nd domain, and that goes through just fine. It's only on new email creation from 2nd domain to external. Primary domain sends/receives
just fine.
The users that are using the 2nd domain, aren't using the primary domain. I've added the 2nd domain, and made it the primary reply. But left the original primary on the account.
I don't think I've missed any steps here. The primary domain has a GoDaddy SSL, that obviously doesn't match the 2ndary domain, but in the past (sbs2003) that's never been an issue, it's always worked.
With out a bounce back / rejection I'm not sure where to start troubleshooting.