Hello,

This error occurs when you have a disk quota for an account exceeded, or one of your email users no longer has enough space for the message being sent to them.

Symptoms ::

You can no longer receive emails. emails bounce with a Disk Quota Exceeded error. Webmail stops working.

Solution ::

I :: Check mailbox quota for a specific email user

1. Log into Plesk.
2. Click on Domains
3. Click on the domain in question
4. Click on Mail:
5. Select the user you wish to check
6. Click on Mailbox
7. Now you can view the user's quota. Adjust the settings if necessary.

II :: Check Disk Space and Mailbox limits for a specific domain:

1. Log into Plesk.
2. Click on Domains:
3. Click on the domain in question:
4. Click on Limits:
5. Check Disk space and Set the mailbox quota. Adjust the settings if necessary.

III :: Check the disk quota for your entire service

1. Log into Plesk.
2. Click on Virtuozzo
3. Click on Resources:
4. View your current Disk Usage:

If you are out of disk space for your entire server you can either remove files or upgrade your service.