[Dovecot] Use Replication plugin to do a backup (one-direction sync)

Hello,

I have a setup where I need to have Server A (dovecot 2.1.7) replicated on a Server B (dovecot 2.1.7). I know that I can do a per user backup with:

doveadm -D backup -u %u remote:mailmirror@serverB

I would like to use Notify/Replication to backup only when there's something new. I don't understad if the Replication plugin can be used to do a backup server, or it's only of for two-way sync?

My question is: It's possible to use Replication to do a backup (one-direction sync)?

Thanks

Francesco