I'm syncing mail from an IMAP server to local Maildirs with `doveadm
backup -R`, and I sometimes get an error the second time I sync an account:
> Mailbox INBOX sync: mailbox_delete failed: INBOX can't be deleted.
I've figured out that the sync completes the first time without an
error, but the UIDVALIDITY of the INBOX Maildir doesn't match the
UIDVALIDITY on the IMAP server. Then the second time doveadm detects the
mismatch and wants to delete the INBOX, but it can't because Maildir
INBOXes can't be deleted.
So I think the root cause is that the INBOX is being created with the
wrong UIDVALIDITY in the first place. It only seems to happen when there
are no messages in the INBOX on the server at the time the Maildir is
created, but it doesn't seem to happen all the time.
Is there anything I can do to make the sync job run smoothly?
Andy
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