==== REQUIRED BASIC INFO OF YOUR IREDMAIL SERVER ====
- iRedMail version (check /etc/iredmail-release): 1.7.4 MARIADB edition.
- Deployed with iRedMail Easy or the downloadable installer? downloadable installer
- Linux/BSD distribution name and version: AlmaLinux release 10.1 (Heliotrope Lion)
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): MySQL
- Web server (Apache or Nginx): Nginx
- Manage mail accounts with iRedAdmin-Pro? Yes
- [IMPORTANT] Related original log or error message is required if you're experiencing an issue.
====

Hello,

I am migrating domains from Server A to Server B, however, Server A has a POP3 configuration different from that of Server B, which is causing messages on the accounts migrated to Server B to be downloaded to the email client again after the migration.

Server A Configuration:
    pop3_uidl_format = %f
Server B Configuration:
    pop3_uidl_format = %08Xu%08Xv