You'll find a bunch of date files, like
2012_2_4.grp. Do these files ever change? I'd like to know because if they don't change perhaps I can run a specific rsync that doesn't update files that already exist, and speed up the process of syncing SmarterMail servers.
Any other tips on how to speed up syncing SmarterMail servers would be appreciated. I'm trying to get the server we're migrating to, to be as a current as possible prior to the switchover.