[Dovecot] Using dsync to export mail to remote IMAP account

[Timo Sirainen]

On Mon, 2013-04-22 at 19:56 -0700, Joseph Tam wrote:
> 
> I've read the web/man pages on dsync, but it's not clear to me whether
> dsync can be used to export (rather than import) a user's mailbox to a
> remote non-dovecot IMAP account.

It should be possible at some point, but currently probably won't work
very well.

> I got this error:
> 
>  	dsync(localuser): Error: user localuser: Initialization failed:
>  		Namespace '': Unknown mail storage driver imapc
>  	dsync(localuser): Fatal: User init failed

But this looks like you simply haven't compiled Dovecot with imapc
support. See if

dovecot --build-options|grep storage

returns imapc.