I set up a cron job to run once per minute. It checks the status of my cable modem.
Thing went haywire and started sending out a bunch of email messages. Didn't realize this until earlier today when I checked my box. 2304 unread messages "Message delivery failed" lol.
I got cron to stfu, but I had to kill exim4. When I restart it, it keeps on sending stuff. I see many files in var/spool/exim4/input. What I'm asking is, how can I tell exim4 to forget any queued or pending messages, or how can i safely delete the queue myself?