How to remove mailman archives on cPanel server

Find your mbox files

ls -la /usr/local/cpanel/3rdparty/mailman/archives/private/my1_lists.domain.com.mbox/my1_lists.domain.com.mbox
ls -la /usr/local/cpanel/3rdparty/mailman/archives/private/my2_lists.domain.com.mbox/my2_lists.domain.com.mbox

Backup *.mbox files if needed and empty them:

truncate -s 0 /usr/local/cpanel/3rdparty/mailman/archives/private/my1_lists.domain.com.mbox/my1_lists.domain.com.mbox
truncate -s 0 /usr/local/cpanel/3rdparty/mailman/archives/private/my2_lists.domain.com.mbox/my2_lists.domain.com.mbox

Go to bin/ folder and wipe as following:

cd /usr/local/cpanel/3rdparty/mailman/bin

./arch --wipe my1_lists.domain.com
./arch --wipe my2_lists.domain.com
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