How to resolve the "Mailbox is Full" (Quota Exceeded) error Print

If a client or business partner attempted to send you an email and received a bounce-back message stating "Quota Exceeded" or "Mailbox is full", it means your professional email account has reached the maximum disk space storage threshold allocated to it inside cPanel.

When this threshold is crossed, the specific mailbox becomes locked out, refusing to accept any new incoming correspondence until you clear server logs or increase the individual storage quota limit.

Step 1: How to verify and increase email quota in cPanel

If you are the primary administrator of the hosting service account, you can expand an individual mailbox storage limit in just a few seconds:

1. Log in to your cPanel dashboard.
2. Under the "Email" framework block, click on Email Accounts.
3. You will view your active directory of email accounts alongside an usage status bar. Locate the full mailbox and click the Manage button next to it.
4. Scroll down the preferences area to find the Allocated Storage Space section.
5. Type in a higher numerical value in Megabytes (e.g., upgrading from 1024 MB to 2048 MB) or, if your active IMOMA TECH hosting tier allows for it, select the Unlimited toggle option.
6. Click Update Email Settings at the footer of the page to commit changes.

Step 2: How to free up space using the Email Disk Usage utility

If your global web hosting package's absolute storage ceiling is fully maxed out, expanding individual limits won't solve the block. You will need to purge heavy or old files. cPanel features a built-in utility to prune large volume directories in mass actions:

1. Inside cPanel, search for Email Disk Usage in the main navigation search bar and open it.
2. From the dropdown menu, choose the specific user email account you want to clean up.
3. The dashboard will chart all existing directories (Inbox, Sent, Spam, Trash) and the precise storage payload each one carries.
4. Next to the folder you want to clear out (such as your Spam or Trash folders), click on the Manage link on the right side row.
5. Select a pre-configured deletion rule from the dropdown choice layout, such as:
   • 1 year or older (Messages received over a year ago).
   • All messages (Completely wipe all logs in this folder).
6. Click the Delete Permanently button to clear out the database records.