# Mail server IP blacklisted: delisting runbook

Source: https://srvscripts.com/guides/runbook-ip-blacklisted/
Updated: 2026-10-03
Publisher: srvScripts (https://srvscripts.com/)

What to do with a mail server IP blacklisted by Spamhaus, Barracuda or Microsoft: find and stop the source, clean the queue, fix rDNS, SPF, DKIM and DMARC, delist, and relay mail meanwhile.

The full guide is for srvScripts members: https://srvscripts.com/guides/runbook-ip-blacklisted/