FreeBSD Server - Fresh still with sendmail help

[bassglider]

I want to create a really nice roundcube server, for now I don't need anything else. Just the functionality of roundcube mail. I have a fresh freebsd install on a dedicated box. What do I need to install Prior to installing roundcube. I have a FAMP install (freebsd, apache, mysql, php) already.

From what I have read I need:

Imap-Courier
Roundcube mail

I understand the roundcube mail, but could someone tell me if I need to do anything else in my system?
can I use sendmail or do I need a different MTA?
do I need to install pop/smtp ports?

Thanks