>Thanks for all your help in my getting the backup server up and >running. One quick question still remains? Now that I have the >backup server up should it be answering requests and sending mail >sometimes or just when the primary server is down? sure, even temporary timeouts at the primary MX as seen by sender should cause the sender to try to send the next MX.
> I think that it would probably answer some requests if the primary is busy?
yes, it will. It accepts the mail, then immediately tries to send it to the next higher, reachable MX (if you had 5 MX's for a domain)
> Could someone please help me out with this subject.
I run two IMGate's as MX 10 and 20. I very rarely seen any traffic on the 20 box. ie, trying the backup MX, ime, is exceptionally rare.
That said, if you have domains on both boxes, then each provide backup MX for the domains on the other box. This shares your total traffic/web access over two boxes, and gives you backup MX.
Len
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Len Conrad