Overall our email is working but we had an issue sending mail today:
>>> in-mta4.srv.hcvlny.cv.net rejected your message to the following
...
>>> Reverse DNS failed.
...
>>> Generating server: NYCMAIL01.internaldomain.net
The internal-only hostname is being sent in the email header which of course is not resolvable externally hence the failed reverse DNS error. Is there any way to modify this servername to something publicly resolvable? I checked the send connector which is blank.. also that is GLOBAL not server level so I think that's a dead end.