Could you pls config that my statement is true? In client template there are two quotas one for fs and second for mail. Because mail owner is vmail not user that means fs quota is independend from mail quota. So simply if I give 1GB and 1GB that means user will have total 2GB storage.
Yes, thats correct. FS quota is for web / FTP / shell only and mail quota is a virtual quota which is independant from web quota.