==== REQUIRED BASIC INFO OF YOUR IREDMAIL SERVER ====
- iRedMail version (check /etc/iredmail-release): 1.7.4
- Deployed with downloadable installer
- Linux/BSD distribution name and version: ubuntu 22.04
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): LDAP
- Web server (Apache or Nginx): Nginx
- Manage mail accounts with iRedAdmin-Pro? No
- [IMPORTANT] Related original log or error message is required if you're experiencing an issue.
====

Hi,

this issue hit me in the last few days:

No updates detected in the log for the freshclam daemon (the
 ClamAV update process).  If the freshclam daemon is not running,
 you may need to restart it.  Other options:
...

Because 22.04 recently upgraded clamav from 0.103.5 to 1.4.3

The specified work around there solved it for me too:

adding a new /etc/logwatch/conf/services/clam-update.conf:

LogFile =
LogFile = none
*JournalCtl = "--output=cat --unit=clamav-freshclam.service"