I gave my take on this a while ago so you may want to look in the archives.
Basically, IMHO, you can't verify an email
address with any certainty unless you send a mail to the address and monitor
bounce-backs. If you don't care about a
good level of certainty then you can try doing an MX lookup on the domain of the
address and, if that is successful,
then you can connect to the server and initiate a mail sending and then quite after
sending the RCPT clause. This is
what a lot of so-called email address verifiers do.
Regards,
Howie
----- Original Message -----
From: "Jose Gosende" <[EMAIL PROTECTED]>
To: "inFusion Support List" <[EMAIL PROTECTED]>
Sent: Thursday, August 01, 2002 9:58 AM
Subject: [iMS] email verification
> What's the *safest* way to verify an email address exists?
>
> Thanks,
>
> Jose
>
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