Ability to disable 'unlimited' email quotas
I would like to request that the ability to disable the 'unlimited' email quota option be re-added. I think that having the option of forcing users to set a mailbox quota limit would be beneficial as this would help to prevent users from storing Gigabytes of emails under their account which often causes I/O issues during IMAP syncs / backups etc.
An option to set a "Maximum user-defined mailbox quota" limit would also compliment this and give admins the option of ensuring that
a) A mailbox quota limit is set
b) The mailbox quota limit cannot be set above X Megabytes.