On Tue, 2009-08-11 at 16:44 -0400, Mario Antonio wrote:

I need to copy some email storage from a Dovecot Server running 1.0.15
into another Dovecot Server running 1.2.2. I know that I can use imapsync (perhaps this is the proper way)

But I was just wondering, if I can just run Rsync to do that transfer: Will I run against some incompatibility formats between these two versions?

There are some small differences, but I think it's safe to just use rsync. You might get some "corrupted index file" or something errors for a while, but they should get fixed automatically.