Dsync problems

Hi,

I'm setting up a migration between 2 dovecot servers 2.1.12 to 2.2.19 . I've ran into some issues with dsync.

I use the following command for syncing:

doveadm -o mail_fsync=never -o imapc_host=%remote% -o imapc_master_user=master -o imapc_password=%masterpw% -o imapc_features="rfc822.size fetch-headers" -o mail_prefetch_count=20 -o imapc_user=%user% backup -1 -R -u %user% imapc:

I execute a full sync first and when the mailserver are being migrated it only would have to do incremental. The first is run is without problems. But I find the following problem:

• Flags on current mails aren't updated. If I set message to unread, the sync won't pick them up.
• On the origin dovecot server I had removed some messages and purged the inbox. Those message are now in the Trash and are created again and again when I sync

Is this normal behaviour? It renders it pretty much useless since data consistency isn't guaranteed.

Regards,

Frank de Bot