I run 38 virtual servers on one physical server, and want to deliver outgoing email normally for all but two. Those two virtual servers need to use Solarwinds' Mail Assure service.
Incoming email works fine in all cases, but if I try to send outgoing email for those two domains through Mail Assure not only does it not work but breaks all outgoing email delivery.
Call them domain1.tld and domain2.tld.
How do I properly setup outgoing email delivery per domain? I see lots of examples on the Internet but none seem specific to this need.