I installed horde-base-3.3.2 / horde-imp-4.3.2,1 / vpopmail-5.4.26_1 /
courier-authlib-vchkpw-0.61.1 / courier-imap-4.4.1,2 / qmail-1.03_7 / mysql-client-5.1.30
on a server FreeBSD 7.0 in a jail.
I installed mysql-server-5.1.30 on the same server FreeBSD 7.0 but in another jail.
I can send / receive e-mails with Outlook in IMAP, my SMTP server and my Server IMAP work
well.