The following support article demonstrates how to set the size limit for email accounts under a subscription in Plesk for a VPS. This can be done to limit the amount of hard drive space that the mailbox owner can store on the server.


  1. Once you have logged into Plesk click on the “Subscriptions” tab from the left hand side menu. Then, under subscriptions, click on the hosting subscription where you want to limit the mailbox sizes.
    setting mailbox sizes in plesk
  2. Under the “General” tab click on “Customize”:
    setting mailbox sizes in plesk
  3. Under “Mailbox size” you can specify the size of the mailbox, or tick “Unlimited” which enables each mailbox to use up to all available disk space allocated to the VPS. Click OK to save the changes.
    setting mailbox sizes in plesk 
  4. You can verify the changes under the email tab as well as seeing the current usage:
    plesk 11.5 - email summary
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