Cpanel - Mail Problems

Since my (unmentionable canadian hosting) service crashed two weeks ago
and came back up, I have been having some email problems with add on
domains Mailers get a "mailbox full" msg and a returned email, even
tho my mailbox(es) clearly are not full.

Here's support's reply.....does this make sense?

"The cpanel system has proven less than reliable at maintaining mail
service settings for add-on domains. We recommend setting up the add-on
domains as separate cpanel accounts. This can be done using the /whm
system on the account (same login as /cpanel) Once they have their own
cpanel user/login and separate account the cpanel system can handle the
mail much more efficiently."

Cajun-Gwailo wrote:
> Since my (unmentionable canadian hosting) service crashed two weeks ago
> and came back up, I have been having some email problems with add on
> domains Mailers get a "mailbox full" msg and a returned email, even
> tho my mailbox(es) clearly are not full.
>
> Here's support's reply.....does this make sense?
>
> "The cpanel system has proven less than reliable at maintaining mail
> service settings for add-on domains. We recommend setting up the add-on
> domains as separate cpanel accounts. This can be done using the /whm
> system on the account (same login as /cpanel) Once they have their own
> cpanel user/login and separate account the cpanel system can handle the
> mail much more efficiently."

No it doesn't.