IMail Server lets you set up "peer" servers to allow users for a specific domain to be spread across multiple physical systems. This can be used when the mail traffic on your IMail Server becomes heavy enough to slow down mail processing. How much traffic your mail server can handle will depend on your system's hardware configuration. See also How Peering Works.
Note: Before you create the peer list, you need to set up the peer servers. Once set, then see Creating the Peer List
Important: The domain alias cannot be a primary domain associated with a particular host. Do not enter IP addresses in the Domain Aliases box.
Important: On each of the three computers, make sure the Default Mail Domain or IP box on the Services > SMTP tab is empty when using peer lists.
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