I just did an upgrade on an important server, and now, no email is received from other servers.
There is no error in mail.log
, or any other log in that sense. It is as if no email even comes to the server from scratch. The server is not rejecting them. They don't even appear in the logs. They are not even bounced.
Upgrade performed:
apt-get upgrade openssl
It was after a bunch of apt-get update
s, and service restarts. It was all fine that far, until I did the upgrade.