And you do give up the "smtp security" feature of "Verify User: off" since that's the smtp protocol feature used by Imail to find out on which Imail peer resides the mailbox account for the incoming mail.
Doing peering for a 2ndary mail server seems a poor way to go, since you have to buy another Imail license (hey, the price is right!! vbg). It would be better to have the 2ndary mail server and DNS off your site and off your links to the backbone. But the 2ndary mail server could be any other smtp server, such as freebies like exim or qmail on freebsd or linux.
The Imail peering redundancy is strictly smtp redundancy. When a peered Imail server goes down, smtp traffic destined for that server will get stored on a peer (or other backup MX server), but the client mailboxes on the down server will be unaccessible (POP3, Web Msging, etc) until that server comes up.
btw, the excellent Imail pdf doc on peering is very clear, including DNS setup.
So the main advantage is distributing your total mailbox load among more than one server, AND having smtp backup server as a freebie. Beyond that I can't think of any advantages, but there are a couple of disadvantages.
Len
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Dusty and friends,
I would like to ask you if you can help me set my 2 servers for a single
domain. Instructions from you is really appreciated. btw, what are the
advantages of having peer servers besides redundancy?
Raymond
