I am seeing the exact same thing. Log is being flooded with these lines:
24.9.2025, 14:54:13 controller 39 map htymxj error reading https://maps.rspamd.com/rspamd/mid.inc.zst(157.180.118.77:443): connection with http server terminated incorrectly: IO read error: unexpected EOF
24.9.2025, 14:54:10 controller 39 map 4x4rch error reading https://maps.rspamd.com/rspamd/redirectors.inc.zst(157.180.118.77:443): connection with http server terminated incorrectly: ssl connect error: ssl error: error:0A000126:SSL routines::unexpected eof while reading
24.9.2025, 14:49:40 controller 39 map o856fg error reading https://maps.rspamd.com/freemail/disposable.txt.zst(157.180.118.77:443): connection with http server terminated incorrectly: ssl connect error: ssl error: error:0A000126:SSL routines::unexpected eof while reading
Over the past weekend I tried to find out if it was just being my system or a general problem and installed mailcow in a newly created VM. I immediately started getting these errors.
I checked on some of these files and found them being rather old, so I am not to worried:
root@mail:/opt/mailcow-dockerized/data/conf/rspamd# ls -la /var/lib/docker/overlay2/0519846e1b7a0f6acaac86822707456e340f1813200927e0de89ca01f5d4843f/diff/etc/rspamd/maps.d/mid.inc
-rw-r--r-- 1 root root 600 Jun 17 11:34 /var/lib/docker/overlay2/0519846e1b7a0f6acaac86822707456e340f1813200927e0de89ca01f5d4843f/diff/etc/rspamd/maps.d/mid.inc
root@mail:/opt/mailcow-dockerized/data/conf/rspamd# ls -la /var/lib/docker/overlay2/0519846e1b7a0f6acaac86822707456e340f1813200927e0de89ca01f5d4843f/diff/etc/rspamd/maps.d/redirectors.inc
-rw-r--r-- 1 root root 9882 Jun 17 11:34 /var/lib/docker/overlay2/0519846e1b7a0f6acaac86822707456e340f1813200927e0de89ca01f5d4843f/diff/etc/rspamd/maps.d/redirectors.inc
Something seems to be wrong with rspamd at the moment. Maybe this is a problem with version 3.12.1?