On 02 Dec 2015, at 10:25, Peer Heinlein p.heinlein@heinlein-support.de wrote:
We're using
doveadm -o imapc_user="$USER" -o imapc_password="$PASSWORD" -o imapc_host=$SERVER1 -o pop3c_user="$USER" -o pop3c_password="$PASSWORD" -o pop3c_host=$SERVER1 -D -v backup -R -u "$USER" imapc:
to migrate Mails from Courier to Dovecot.
We have some complaints on the old system that there are changes on the old system where delete mails are appearing again (IMAP) and/or mails are downloaded several times (POP3).
AFAIK there can't be changes on the old system if "backup -R" is used.
Or is there any situation where changes on the old system (where we connect with imapc) may happen?
No.. There really shouldn't be any changes to the source when doveadm backup is used. I can't think of any reason for the behavior you're seeing. You could enable pop3c_rawlog_dir and imapc_rawlog_dir though to see what dsync is doing.