Qmail

A solid & secure MTA written by Dan Bernstein

qmail can be a bugger to learn and debug. The logfile is especially terse and doesn't even use normal timestamps.

That said, the program is pretty solid and seems to have a lot of diehard fans. A program I've found very useful in maintaining qmail is qmHandle.

Here are some example of it's usage.

hostname[root]~# ./qmHandle -s -c
Messages in local queue: 31249
Messages in remote queue: 135

Remove queued messages with the string "failure notice" in the Subject: header.

hostname[root]~# ./qmHandle -S"failure notice"

More of that...

hostname[root]~# ./qmHandle -S"Mail delivery failed"

Show queued messages with other subjects of interest.

./qmHandle  -l | more