The Best Open Source Email & Collaboration Software
@StefanGries we have a quite detailed write up in our blog: http://t.co/CCDNuQXVgL but normally you just replace packages.
@morrow without logs this will be hard to track down. can you ask your administrator to open up a support case for this?
@morrow hm.. sounds weird. do you have by any chance an error message in mail.app and the corresponding lines in gateway.log (log_level 6)?
@morrow IMAP Gateway. Have you tried deleting and readding the account? http://t.co/68oybADbtJ suggests that it might work.