On Sat, 2012-03-17 at 18:29 +0100, Radim Kolar wrote:

...

dsync(admin): Error: Failed to sync mailbox sent-mail-feb-2012: Mailbox GUIDs are not permanent without index files Well, you can work around if by letting it create indexes. Hm. Why exactly can't it create indexes? Do you have some setting disabling them? indexes never existed because these mboxes were never used by dovecot, its not conversion from one format to another, its import.

Maybe open bug to add feature "dsync import" which will not depend on existing indexes?

dsync doesn't need existing indexes, it wants to create indexes. If it can't because of e.g. permission issues, you should be able to work around it with:

dsync mirror mbox:~/mail:INDEX=/tmp/indexes

I might change dsync at some point to work even without permanent mailbox GUIDs, but there are many other more important things to do.