Cpanel script to correct mail directory's incorrect disk usage

Here is a tip from the cpanel team :

Sometimes mail accounts belonging to a particular cpanel account may show Zero disk usage, irrespective of the actual content. The following cpanel script can be used to fix this :

/scripts/generate_maildirsize --confirm --force --verbose baba38zz -- generates mail directory size for the user "baba38zz".

Please refer : https://tickets.cpanel.net/review/msg.cgi?ticketid=550573 for further clarification.