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Yes, and you can use nslookup or similar to find the MX record for the
domain (which is a special type of DNS record listing the mail servers for
a domain). Then you could telnet to each listed mail server. But I think
that if something goes wrong and you get complaints from your users, you
would have a rather tough time figuring out where your verification
procedure went wrong.
The method of emailing people a random password or token and requiring them
to enter it is IMHO a much safer way of verifying not only the validity of
an email address, but that the person signing up actually has access to it.
Also the 'resolve host and then telnet' approach feels a bit like shooting
mozzies with anti-aircraft artillery...
Viktor Radnai
Web Developer, National E-Commerce, Ernst & Young
Direct: +61 2 9248 4361
"Taco Fleur"
<[EMAIL PROTECTED]> To: "CFAussie Mailing
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Sent by: cc:
[EMAIL PROTECTED] Subject: [cfaussie] RE:
RegEx for email checking
mon.com.au
22/01/2003 10:19 AM
Please respond to "CFAussie
Mailing List"
I just wanted to comment on my own message, regarding the checking of
email for existence..
I just remembered that it is possible to perform a session via telnet to
the mailserver checking if it will accept any messages to the email in
question.
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