Read message from postfix queue

Reading message content on postfix queue
postcat -q MESSAGE_ID

To get "MESSAGE_ID" we can use "mailq" or "mailq | grep " where  is a e-mail address.

To delete a mail from queue use the command below:
postsuper -d MESSAGE_ID

To delete all deferred messages from queue:
 postsuper -d ALL deferred

To get ALL the MESSAGE_IDS of a particular e-mail address from queue:

 mailq|grep apache@vagrant2.vagrantweb.com|awk '{print $1}'

To delete ALL the mails from queue of a particular e-mail address:

for i in `mailq|grep apache@vagrant2.vagrantweb.com|awk '{print $1}'` ; do postsuper -d $i ; done

To delete ALL the mails from queue
postsuper -d ALL

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