Validating outlooks existance pros and cons to internet dating

Posted by / 11-Jun-2017 17:26

Validating outlooks existance

In some situations, such as validating custom controls or supporting legacy browsers, additional scripting may be necessary to validate user input.

Custom validation needs to notify users in an accessible way as described in the User Notifications part of this tutorial.

I have a question, i have a php script to check if the email address exist.

But appear that yahoo, hotmail, aol and others providers are accepting any emails and not rejecting the invalid emails.

@Hrvoje: Yes, I'm suggesting you monitor rejected emails. Your validation program needs to open a TCP/IP connection to the server's port 25 (SMTP), write in a few lines and read the answer.

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There's several libraries that can do that, and also a page with open-source code in ASP Classic ( Email.asp#Result3), but I have hard time reading ASP Classic, and it seems that it uses some third-party library...

Is there some code for SMTP validation in C#, and/or general explanation of how it works?

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I am sure it will be similar for other versions also. I'd like to be able to say "except if sender is in 'company' OR 'contacts' address book".

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