Postfix Queue Management

Again some very useful one liners but this time to manage the Postfix mail queue.

Release messages from hold

mailq | awk '{if($1 ~ /[A-F0-9]+!$/) {gsub(/!/, "", $1); print($1); system(sprintf("postsuper -H%s", $1)); } }'
postqueue -f 

Requeue hold messages to force delivery

mailq | awk '{if($1 ~ /[A-F0-9]+!$/) {gsub(/!/, "", $1); print($1); system(sprintf("postsuper -H%s", $1)); } }' 

Flush the queue

postqueue -f

Clean all MAILER-DAEMON error messages 

Normal Messages

mailq | tail +2 | awk '{ if ($7 == "MAILER-DAEMON") print $1 } ' | postsuper -d -

for me mailq returns the message id with a trailing ! so I use:

mailq | awk '{ if ($7 == "MAILER-DAEMON") print substr ($1, 1, length($1)-1) } ' | postsuper -d -

Messages with errors

mailq | grep MAILER-DAEMON |  sed -e 's/!$//' | cut -d " " -f 1 | postsuper -d -

or

mailq | tail +2 | awk '{ if ($7 == "MAILER-DAEMON") print $1 } ' | sed -e 's/!$//' | postsuper -d -

If you want to delete messages with the ! sign on the end, use

mailq | tail +2 | awk '{ if ($7 == "MAILER-DAEMON") print $1 } ' | cut -d! -f 1 | postsuper -d -

NOTE: Sometimes, you may need to omit the:

tail +2