Email SMTP validator

Posted by Hrvoje on Stack Overflow See other posts from Stack Overflow or by Hrvoje
Published on 2008-08-26T06:10:01Z Indexed on 2010/05/08 22:28 UTC
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email

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validation

I need to send hundreds of newsletters, but would like to check first if email exists on server. It's called smtp validation, at least i think so, based on my research on net.
There's several libraries that can do that, and also a page with open-source code in asp (http://www.coveryourasp.com/ValidateEmail.asp#Result3), but I have hard time reading classic asp, and it seams that it uses some third-party library...
Does someone have code for smtp validation in c#, and/or general explanation of how it works?

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