does anyone has the script (either JSP,PHP,ASP, PERL) that can check whether an email address exist or not by checking into the MX Records on the mail server..

MX records only point to a mail server not if a user exists or not

Email Verification

Not cheap but seems to work ok. Evaluation done some time ago for a newsletter application.

Hi there

Here's an article on sending and validating emails with ASP .NET 2.0.

3 types of validation are discussed: format, domain and account; all with code samples.

ASP .NET Tips - Email


Hope this helps...

Nice article Buddy. Really useful