On Wed, 2013-03-20 at 08:15 -0600, dormitionsk...@hotmail.com wrote: > My experience with IMAP over the internet with a couple of servers outside > our monastery (while I was in it, and we have considerably better download > speeds than upload) has always been that IMAP has always been incredibly > slow. So, I've always just allowed users to connect to the IMAP server via > webmail. It's slow, but usable.
Another idea: Get some cheap server from outside, use dsync replication to keep it synced with your internal one, and set up DNS so that users get directed to the fastest server. http://wiki2.dovecot.org/Replication