Manage the postfix mailqueue with postsuper, postqueue and mailq

Postfix provides with postsuper, postqueue and mailq some  shell utilitys to manage the mailqueue.

Here are some examples for common tasks:-

I found this on this URL :-

Its a very good article, Thanks to faqforge.com

Some more useful commands:-


List All Emails :-
To list all mail of queue, use one of the following command

# postqueue -p

 Flush All Emails :- 
To delete or flush all emails from Postfix mail queue using the following command.

# postsuper -d ALL

 Flush Deferred Mails Only :-
You can only delete all deferred emails only from mail queue. Use the following command to delete deferred emails from the queue.

# postsuper -d ALL deferred

Remove Specific Email :-
If you want to remove any specific email. Use the following command to remove specific emails only. First search the ID of that email like below command

# postqueue -p | grep "email@xyz.com"

you will get result
527EF61F7A3   251145 Tue Aug 13 18:13:34  email@xyz.com

 

To Read email from this mail_id

   # postcat -q 527EF61F7A3 (your mail id)
 

Now delete the mail from mail queue with id 527EF61F7A3

# postsuper -d 527EF61F7A3

 To resend all emails:

 # postsuper -r ALL && postqueue -f

Remove messages from specific domain :- 

mailq | grep yourDomain.com | awk {'print $1'} | xargs -I{} postsuper -d {}