Hi Team, After creating the HA cluster, I found a problem. The mail enters the gateway. If it enters the master host, it will be synchronized to the slave host, but if the mail enters the slave host first, it will not be synchronized to the master host. This is not only It is limited to normal emails, including spam emails. Therefore, I would like to ask if this is the original design of the system. If this is the case, the cluster does not seem to be very good. Thanks for the reply.