Hi,
recently I've been having trouble with 3 internal users that seems to be unable to send emails to internal users form a shared domain verified on onmicrosoft.com. All has been working for about 1 year +. Those Users can receive email from any other service but when I send from onmicrosoft.com it does not work.
Getting error from MAILER-DAEMON@MAILER-DAEMON
bosimpinc04.eigbox.net.
The error is saying that the recipient does not exist but it does.
and refused by bigfish.com (I don't like "fish" in that name makes it feel like they are corrupt by a virus) is it possible a virus could do this?
Anyone have an Idea?
regards.