How-To reinstall the Mailman RPM

Introduction

The Mailman system is written in Python and although rare, is sometimes susceptible to corruption.  If Mailman can't start and you cannot find another reason for this, it may be that some of the configuration files are corrupted.  In that case, it's best to simply reinstall the Mailman RPM.  

Procedure

1. Run the following command to remove the current cPanel Mailman installation:

   On AlmaLinux, CloudLinux, or Rocky Linux:

   rpm -e --nodeps cpanel-mailman

   On Ubuntu:

   dpkg -r --force-depends cpanel-mailman

2. Run the following check to reinstall the cPanel Mailman plugin:

   /usr/local/cpanel/scripts/check_cpanel_pkgs --fix --targets=mailman