Verify email in PHP or other programming language?

问题:

How can i make a script like verify-email.org ? I told in the school, that this is not a problem. But now, I searched the web, and found nothing?

E.g. [e-mail]

• I don't want only check if the domain exist of the E-Mail address. I want check, the whole E-Mail, if it exists on Hotmail.com?

Thanks.

回答1:

You can't. You have to send an email and wait for an answer to verify that this address exists.

回答2:

The only clear way to check an email address is valid is to send it an email. If it isn't valid you will get an undelivered response.

回答3:

Like my predecessors wrote, you can only completely veryfiy by sending a mail to the address.

However, you could use DNS to check if the domain exists and a MX (Mail Exchange) record is associated with it. It's not a complete solution, but maybe a step that brings you a little further.