We have 4 servers in the cluster.
Some time ago in replication history we see entry with old date (see window screen).
Link:http://s013.radikal.ru/i323/1011/ee/b206d0686f78.png
Because of this broken SCR-replication and user that receive mail via POP3 are complaining that the mail client receives duplicates of already received messages. If we clear replication history manually and replicate they database, problem fixed.
Why can this be and how to fix it?
P.S. I apologize for my terrible English.