==== REQUIRED BASIC INFO OF YOUR IREDMAIL SERVER ====
- iRedMail version (check /etc/iredmail-release): 1.6.8
- Deployed with iRedMail Easy or the downloadable installer? Downloaded
- Linux/BSD distribution name and version: Ubuntu 22.04
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): MariaDB
- 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.
====

My PFLOGSUMM shows that my server delivered double of the received messages.

Grand Totals
------------
messages

    160   received
    320   delivered
      0   forwarded
      0   deferred
      0   bounced
      0   rejected (0%)
      0   reject warnings
      0   held
      0   discarded (0%)

   9166k  bytes received
  18439k  bytes delivered
    100   senders
     63   sending hosts/domains
     14   recipients
      5   recipient hosts/domains

Is this an artifact of counting in pflogsumm? or are my mails be cloned somewhere?

I'm not receiving double emails in the various accounts on the server.