server qmail & mail commands

useful & most used (often forgotten) commands

qmail command line

show snapshot of messages in queue
/usr/sbin/qmHandle -L
show all messages in queue
/usr/sbin/qmHandle -l
show message detail
/usr/sbin/qmHandle -m27086283
deletes messages from queue with - 'failure' in subject
/usr/sbin/qmHandle -Sfailure
show connected SMTP connections (ip's)
netstat -ntalp | grep :25 | awk '{print $5}' | cut -d':' -f1 | uniq -c | sort -n