List of handy commands for different mail server software

Contents

List of handy commands for different mail server software

Generic Commands

List mail queue:
```
mailq
```

10 top email sender addresses (may take a while to run):

mailq|grep -i ^[a-z]|grep -Ev 'MAILER'|awk '{print $7}'|sort|uniq -c|sort -nr|head

Sendmail

List mail queue:
```
sendmail -bp
```
Flush mail queue:
```
sendmail -q
```
Delete message with ID XXXXXX from mail queue (dirty hack):
```
rm /var/spool/mqueue/*XXXXXX*
```
Example command to remove mail from the queue for a specific user (USER in this example):

DON'T USE THIS UNLESS YOU KNOW WHAT YOU ARE DOING!

mailq|grep USER|while read id crap; do rm /var/spool/mqueue/*$id*;done

Postfix

List mail queue:
```
       postqueue -p 
```
Flush mail queue:
```
       postqueue -f 
```
View contents of message with ID XXXXXX in mail queue:
```
       postcat -q XXXXXX
```
Delete message with ID XXXXXX from queue
```
      postsuper -d XXXXXX
```
Example command to remove all messages from mail queue originating from one users (in this example USER@SERVER.anchor.net.au):
```
mailq|grep USER@SERVER.anchor.net.au|cut -f1 -d' '|tr -d '*'|postsuper -d -
```

This may not always get 100% of the messages as sometimes the message ID is on the previous line, in which case something the following will nail them:

mailq|grep USER -B2|grep MAILER|cut -f1 -d' ' |tr -d '*'|postsuper -d -

Qmail

List queue:
```
qmailctl queue
```
Flush mail queue:
```
qmailctl doqueue
```

If the qmail queue gets broken from the file system filling up, you will need to download and run: http://pyropus.ca/software/queue-repair/