Looking at our message tracking failed results, I see plenty of emails from
our mail server going to addresses exchange cannot resolve and thus failing.
I was curious what these emails are, and why the mailbox role is spewing them
For example, the from address is:
And the recipient address is
And the message tracking shows the following error on this email:
550 5.2.0 RESOLVER.ADR.BadPrimary; recipient primary SMTP address is missing