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I wanted to know how to check if an email exists / is real. I’m making a website (in Asp.net), which for the person to do "Register", has to enter an email and a password. But how do I check if the email is real? I know I could check if you have any "@" or ". with" or something like that, but the email may not exist.
Why don’t you do as all the sites do and send an email with a confirmation link? If the user does not click the confirmation link you assume that the email is invalid, simple like this
– Ricardo Pontual
It usually checks if Emal is valid on the client side but to check if it actually exists you would have to communicate with the email service itself, understand? Will it only be a domain used by your application? If it is more than one believe it will take a little more work.
– Guilherme Ramalho