I have no idea where to even start to look for what is going on. Can anyone lead me in the right direction.
The email server has been up for almost 6 months with no problems...it started refusing POP/IMAP connections just a little while ago on all accounts.
Please help!
Update
I just tried to connect using webmin and am getting 'listing' error due to refused connection there as well.
I am getting this error: Failed to connect to localhost:143 : Connection refused
Sounds like Dovecot isn't
Sounds like Dovecot isn't running at the moment -- try logging in over SSH, and running:
/etc/init.d/dovecot start