webmail using maildir
 

I have a friend that want to migrate his server to a open source mail system. Currently, he's using a system using Maildir. So I decided to use qmail since it has support for Maildir and it has pop3 capability. Courier-imap is the one I'll be using for imap.

My concern is webmail. Can anyone suggest a webmail that will run using Maildir format and has addressbook and calendar feature. I'll be using a single server only. Please exclude Squirrelmail from the list.

horde w/ IMP
http://www.horde.org

Use dovecot not courier. You'll thank me for it later. FWIW I recommend postfix over qmail, but it doesn't matter nearly as much as the imap server.

thanks. I actually looking at horde. Zimbra got my attention but it seems it doesn't use Maildir