Just some useful stuff for sendmail

sendmail.md

Sendmail

Checking Queue

sendmail -bp or mailq

to check whats in the sendmail queue

Checking the logs

The sendmail logs should be located:

/var/log/maillog or /var/log/messages

if not, grep the syslog config for mail

cat /etc/syslog.conf | grep mail

This should give you some filenames of mail logs.

In my case, the server was using rsyslog so the adjusted command

cat /etc/rsyslog.conf | grep mail