363 IP addresses in 24 hours, trying to guess user/password combinations on my mailserver. The botnets seem to be back in full force after a little over 2 weeks of almost nothing (yes, that coincides with the war against Iran).

#SelfHost #MailAdmin @homelab

@jwildeboer @homelab We have started to lookup the ASN to see if there is a pattern, and then in one case, so far, take the step to block entire ASNs with ipset from accessing anything except 25/80/443. So friggin’ annoying. Not just on the homelab! Cloud hosting also.
@jwildeboer @homelab interesting, it seems to be going down on my server (for IMAP and SMTP submission):