The server currently uses Courier as the mail server, which supports POP3 and IMAP.
We are changing the mail server from Courier to Dovecot in the new year.
We just have to choose a quiet time on the server to do this, which will take up to one hour depending on loads.
The planned upgrade is for the new year as right now before Christmas the server is reasonably busy.
Dovecot uses index files making IMAP much quicker to load and use.
December 13th, 2015