The quota for an address defines the amount of mail (in Megabytes) that the account can store. When your mailbox exceeds this limit, the system will return any incoming mail to the sender with a message which states that the recipient’s mailbox is full.

It is important to keep track of quota usage, because a full quota will not allow you to receive mail.

To change a mail quota, perform the following steps:

1. Login to cPanel, https://domain.com/cpanel
2. Click on the Email accounts
3. Click on the Quota for the email that you want to increase the mailbox size limit
4. Enter the new email quota (in Megabytes) in the appropriate text box. For an unlimited account, click unlimited.
5. Click Change Quota to store the new value.
   • If you do not wish to change the quota, click cancel.
6. Click Save button to save it