To view a count of the messages in qmail
/var/qmail/bin/qmail-qstat
To view more details on the messages in the queue
/var/qmail/bin/qmail-qread
To view the
To resolve the problem "invalid maildirsize file"
Login to your cPanel server using SSH and run
/scripts/generate_maildirsize <username>
You will need to
To list installaed software and the versions numbers first install apt-show-versions
sudo apt-get install apt-show-versions
They run apt-show-versions which will display currently
Sometimes cPanel does not remove the database correctly and leaves behind files.
Take a backup and then remove the files in
/var/cpanel/datastore/<username>/
Then