courier-imap		http://www.inter7.com/courierimap/
(release versions)	ftp://ftp.sourceforge.net/pub/sourceforge/courier/
(development versions)	ftp://courier.sourceforge.net/pub/courier/imap/

sqwebmail		http://www.inter7.com/sqwebmail/
(release versions)	ftp://ftp.sourceforge.net/pub/sourceforge/courier/
(development versions)	ftp://courier.sourceforge.net/pub/courier/sqwebmail/