Im trying to clear the mail queue after a spam attack. but i am getting this error. running ISPConfig 3.1 on CentOS #postqueue -f #postqueue: fatal: Cannot flush mail queue - mail system is down any suggestions?
Postqueue -f does not remove spam mails. If you want to empty the queue and delete all emails in it, then use the command: postsuper -d ALL But be aware that this might remove valid emails that are stuck too. In most cases, it's better to delete emails selectively by sender as shown here: https://www.faqforge.com/linux/serv...ail-queue-with-postsuper-postqueue-und-mailq/
i have just done this by selective email and it has worked. However, when i look at the mail queue in ispconfig it still shows thousands of email stuck in the queue. when i check with "postqueue -p" there are only a few legit emails left
Once you have solved it, please consider using rspamd's rate limit feature. Has saved me a few times already.
