Long stories short, will Dovecot with the Postfix/LDA give performance equalthan Courier-IMAP or improved (because of the cached message sizes)?
Another thing you want to look at is the UIDLsetting in dovecot.conf, if it doesn't match the one in Courier, then people with leave mail on server will download
all their email again (once) because the UIDL list is different. Just my 2 cents...goodluck Sincerely,Wouter van der Schagt
