I’ve big problem with mailcow sending spam e-mail. It happens only for one from eight domains I provide on this server. There is even 200000 spam e-mails in the queue for day, horrible 🙁
When I disable this problematic domain problem disappering, other domains doesn’t spamming.
Please help to find what causing problem, how to start to overcome it.
Thanks a lot in advance, I’m really stuck,