I'm trying to migrate my old dovecot server (mbox based) to a new one (maildir based), both are version 2.0.13. I'm using dsync: oldserver# dsync -u username backup ssh root at newserver dsync -u username Everything is working like a charm but when it tries to convert compressed folder I got an error: dsync-local(username): Error: Failed to sync mailbox OldMails/2008.gz: Mailbox isn't a valid mbox file. Both old and new installations support compressed folder via zlib plugin. If I'm not wrong dsync doesn't support compressed folder, does it? And, if so, are there any chances to have dsync support gzip'ed folders in the (near) future? Many thanks in advance, gc -- Giulio Casella giulio at dsi.unimi.it System and network manager Computer Science Dept. - University of Milano