29 Jun
2007
29 Jun
'07
9:41 p.m.
FWIW, I used imapsync for the data migrations of a) an old sendmail server with mbox format to a new server running postfix+dovecot, and b) and old and busted Microsoft SBS2000 Exchange instance to a new server running postfix+dovecot.
Worked well in both cases, and the process left the original servers intact in case the migration hadn't gone as well.
Completely unscientific observation, but the Maildir format seems quite responsive in the common email pattern of open the inbox, fetch the message headers, let the filter process spam, finally read ham messages. That has a lot to do with Dovecot's speed, of course.