How to delete emails from the Zimbra MTA queue

To remove large amounts of email stuck in the system queue after a spammer attack, follow these steps. To delete every email in the system queue, run:

[root@EzyMailHosting ~]# /opt/zimbra/postfix/sbin/postsuper -d ALL

If you want to avoid affecting other email waiting in the system, use the following command. This command removes queued email only for the specified sender:

[root@EzyMailHosting ~]# mailq | grep -v '^ *(' | grep [email protected] | tr -d '*!' | /opt/zimbra/postfix/sbin/postsuper -d -

Replace [email protected] with the sender address of the queued email you want to delete.