This feels like an unusually newbie question for me, but... I think my exim queue isn't running. I was born and raised on qmail :-)
I discovered on a relatively new server that the message queue was backed up nearly a month with messages. Fortunately it wasn't a crazy amount, some were double-bounces, and with the help of exiqgrep I got it caught up manually in about a day on and off.
But today it's obvious messages that fail the first time (ex: greylisted) NEVER get retried. Is this a missing cron job? Or command-line param for exim? I would think a relatively stock cPanel install wouldn't suffer from this but... where do I start checking?
/usr/sbin/exim -bd -oX 587
2008-03-09 04:02:15 exim 4.68 daemon started: pid=13511, no queue runs, listening for SMTP on port 25 (IPv4) port 587 (IPv4) [127.0.0.1]:10025
I mean, that seems fairly obvious right there, but I want to make sure I fix it the right way... in case this is merely a checkbox in cPanel or something... Thanks!