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>To perform a DNS lookup for an e-mail address, for example user@xxxxxxx you need to do this: >a) Look up the A record for "foo.com" >b) If (A) didn't work, look up the MX records for foo.com >c) Go through each MX record and look up the corresponding A record. >At least one of those MX records needs to resolve to an IP address. Why would you ever do step (a)? The existence (or non-existence) of an A record for techsoftinc.com has no bearing on where our e-mail goes -- and in fact, it doesn't even go to us at all. All our mail goes to postini for spam/virus filtering and then on to our Exchange SMTP servers. And the A record for techsoftinc.com points to an entirely different location than our SMTP servers. Also, don't forget, it's perfectly valid to have a domain for e-mail that has no associated A record. Take us.ibm.com as an example. -Walden ------------ Walden H Leverich III Tech Software (516) 627-3800 x3051 WaldenL@xxxxxxxxxxxxxxx http://www.TechSoftInc.com Quiquid latine dictum sit altum viditur. (Whatever is said in Latin seems profound.)
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