==== REQUIRED BASIC INFO OF YOUR IREDMAIL SERVER ====
- iRedMail version (check /etc/iredmail-release): 2026110901 (Backend: mariadb, Date: 2026-11-10 22:16:27) iRedMail Enterprise Edition
- Deployed with iRedMail Easy or the downloadable installer? Enterprise
- Linux/BSD distribution name and version: AlmaLinux release 9.8
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): MariaDB
- Web server (Apache or Nginx): nginx
- Manage mail accounts with iRedAdmin-Pro?
- [IMPORTANT] Related original log or error message is required if you're experiencing an issue.
====
After update using the control panel, message delivery to external recipients fails with errors like this:

Nov 10 23:19:00 mailx amavis[270381]: (270381-07) (!!)TROUBLE in check_mail: gen_mail_id FAILED: sql exec: err=1927, 70100, DBD::mysql::st execute failed: Connection was killed at /usr/share/perl5/vendor_perl/Amavis/Out/SQL/Connection.pm line 175.
Nov 10 23:19:00 mailx postfix/cleanup[272896]: 4jPLfD11BHz1KJbg: milter-reject: END-OF-MESSAGE from unknown[172.16.10.223]: 4.5.0 Error in processing, id=270381-07, gen_mail_id FAILED: sql exec: err=1927, 70100, DBD::mysql::st execute failed: Connection was killed at /usr/share/perl5/vendor_perl/Amavis/Out/SQL/Connection.pm line 175.

After a short time the delivery works again.