How To Increase the Storage Limit of Your Mail Account in Plesk

A mailbox quota (also called a storage limit or mailbox size) defines the maximum amount of data a specific mailbox—such as myemail@yourdomain.com—can hold.

When the mailbox reaches this limit, the system rejects new incoming messages. As a result, senders receive bounce‑back notifications, and the mailbox can no longer receive email.

This article explains how to increase the storage limit for a mail account using Plesk.

How To Increase Your Mail Account's Mailbox Quota

To make sure that you receive all your incoming mail, we advise that you increase your Mailbox Quota. You can do this via Plesk by following the instructions below:

1. Access your Hosting Manager.
2. Click Mail from the left-side menu.
   A list of all Email Addresses created in Plesk will appear.
3. Click on the Email Address whose storage limit you wish to increase.
4. In the Mailbox section, you can select any of the two options:
   • Default size (Unlimited)
     This option sets your Mailbox Quota to the maximum limit allowed by your hosting plan.
   • Another size
     This option allows you to enter a specific number in the field provided.
    

   NOTE: You cannot set a Mailbox Quota that exceeds the limit of your hosting space. Also, because of certain mail server limitations, you cannot set a quota that exceeds 4096000 megabytes (4TB or 4096 GB). If you want to set a quota which exceeds that number, you can simply select the Default size (Unlimited) option.

5. Click OK at the bottom of the page.
   A confirmation message will appear indicating that you've successfully saved your settings.

Any changes to your Mail Account will automatically take effect.

You've just learned how to increase your Mail Account's mailbox quota in Plesk. For questions, or if you need any assistance in increasing the storage limit of your mailbox in Plesk, please don’t hesitate to contact us.