How to change the default mailbox size in Plesk

Changing the limit for one subscription

1. 1. Log in to Plesk.

   2. Go to Subscriptions > example.com > Customize (in the right pane).

      

       

   3. On the Resources tab, set you value for Mailbox size.

   4. Click Update & Lock.

      Note: The subscription will be locked for synced with its service plan.

       

Changing the limit for all subscriptions under a service plan

1. 1. Log in to Plesk.

   2. Go to Service Plans > plan_name > Resources tab.

   3. Find Mailbox size and set your value.

   4. Click OK.

It is not possible to manage the default mailbox size via Plesk user interface in Web Admin license edition, because the main purpose of the license is to keep everything unlimited, except for the number of domains.