default email size full problem

[peratik]

Hello

Some of default email of our users become full soon. They don't use default email at all.
We have to remove mail\new folder.
What is the problem and How we can prevent it?

Regards

 

[Infopro]

Have you looked at the mail to see what it is and where its coming from?

 

[peratik]

Have you looked at the mail to see what it is and where its coming from?

A lot of emails:
subject: Mail delivery failed: returning message to sender
from: Mailer-Daemon
Body:
This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:

***email***
Domain ***domain*** has exceeded the max defers and failures per hour (5/5 (45%)) allowed. Message discarded.

 

[Infopro]

1)

Domain ***domain*** has exceeded the max defers and failures per hour (5/5 (45%)) allowed.

This thread may be of some use: Domain example.com has exceeded the max defers and failures per hour (5/5 - cPanel Forums

2)

The following address(es) failed: ***email***

This says your cPanel user's email address is not working or non existent I think.

If the cPanel system needs to alert the cPanel user about something it fires off an email which is forwarded on to the users real email box. Since yours doesn't seem to be working, it's getting stuck in the "default email" box instead of being forwarded onto the "Default Email" address. And then you end up with:

3)

Some of default email of our users become full soon. They don't use default email at all.

Why is the email in item #2 above, not working?