Regarding Cpanel on RH9

Last night I had the ‘/’ dir fill up. I’ve taken care of that problem but it seems to have created a new one. Now when I go to check the mail on any domain it checks the mail and says no new mail. However the inbox file is full of mail. One of the accounts I use IMAP on. Again, same message and all my mail is gone. Once I SSH in and look at the inbox file it’s full.

Can anyone provide help in fixing this problem?

Thanks!