On Wed, 7 Feb 2001, Robert Elz wrote:
> The two problems I'd particularly like to avoid are the valid looking
> e-mail address that simply forwards to what appears to be a black hole
> (some ISPs collecting huge collections of mail no-one ever reads, or
> at least, never responds to).
>
> And worse, the very valid looking "user.registered.dom.ain" where
> "registered.dom.ain" has an MX record that points to the ISP's e-mail
> server, and everything looks well configured.
>
> Until you try and send mail to [EMAIL PROTECTED] and get back
> a bounce message "Relaying for that host denied"...
It is very to validate an address of the reasons that you give above. You
can take either of two approaches; you can skip testing, or you can test
as much as is manageable. Making sure that it is a possible mail domain
(either an A or MX) is quick. Making sure that there is an SMTP server
takes longer time.
Mats
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Mats Dufberg [EMAIL PROTECTED]
NIC-SE +46-8-545 857 06
Box 5774 fax: +46-8-545 857 29
SE-114 87 Stockholm http://www.nic-se.se/
