Several of my customers are reporting sporadic problems receiving email messages, so after running grep over the /var/log/exim_mainlog file, I found several lines like these:
2015-10-21 17:10:19 1Zp1Cc-0002RY-Hq ** [email protected]: Unrouteable address
2015-10-21 17:10:19 1Zp1Cc-0002RY-Hq ** [email protected]: Unrouteable address
2015-10-21 17:10:19 1Zp1Cc-0002RY-Hq ** [email protected]: Unrouteable address
2015-10-21 17:10:19 1Zp1aN-0006DO-50 ** [email protected]: Unrouteable address
The problem is that some of those email addresses really do exist.
So my question is, what is causing this issue?
2015-10-21 17:10:19 1Zp1Cc-0002RY-Hq ** [email protected]: Unrouteable address
2015-10-21 17:10:19 1Zp1Cc-0002RY-Hq ** [email protected]: Unrouteable address
2015-10-21 17:10:19 1Zp1Cc-0002RY-Hq ** [email protected]: Unrouteable address
2015-10-21 17:10:19 1Zp1aN-0006DO-50 ** [email protected]: Unrouteable address
The problem is that some of those email addresses really do exist.
So my question is, what is causing this issue?