At 06:40 PM 1/14/2008, B.A.S. wrote:
No, the client in question doesn't have their own (dedicated) IP and AFAIK the only thing available is a static IP, which I'm guessing wouldn't help since (as I understand it) several domains could be using the same static IP. It doesn't have an SPF record either.
Get a SPF record on the DNS Zone for the domain. A PTR record is also good, but the hosting company usually has to do that one.
As for the mail() function itself, use the "optional" 5th parameter to set the "Return-path:" header. Set it to "-f [EMAIL PROTECTED]". The username doesn't have to exist. Some domains like AOL will throw away email where domain in the "Return-path:" header doesn't match the domain in the "From:" header.
Ken
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