How to perform email verification

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Hey all,
I would like to build a web based application to provide local content only for registered users but here is the challenge that I have, the current database is full of all manners of email addresses because before emails were only being validated not verified, so you find things like a@b.com since it is in the correct email format.What I want is to be able to verify the emails during registration so that when a user enters an email the following happens
1. The email format is validated
2. the email is verified as existing
If there is any that can offer a few pointers, the help will be highly appreciated.
thanks in advance

Posted 12-Mar-12 1:41am

Odd Ondeda

Updated 12-Mar-12 1:53am

v2

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Prasad_Kulkarni 12-Mar-12 7:43am

Unclear

Herman<T>.Instance 12-Mar-12 7:46am

have you read this?

Odd Ondeda 12-Mar-12 7:53am

thanks, that is a start for me

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#realJSOP · Answer 1 · 2012-03-12T01:45:00

Solution 1

The only way you can verify that an email address actually exists is to send a verification email to that email address that requires the user to click a verification link that will then update the database to indicate that the address has been validated by the user.

Posted 12-Mar-12 1:45am

#realJSOP

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Herman<T>.Instance 12-Mar-12 7:52am

it is a way not the only way ;)

Pravin Patil, Mumbai 12-Mar-12 8:03am

Have my 5.

Bojjaiah 12-Mar-12 8:26am

it's very good answer. take my side 5up.

Herman<T>.Instance · Answer 2 · 2012-03-12T01:52:00

The SMTP commands hve 2 commands that can be used to ask about user details (existence of email address). Most stmp servers have set these feautures off to prevent the addresses being used for spam.

Read this[^] about the VRFY and EXPN commands.
You have to VRFY or EXPN against the emailaddress domain (part after @).

How to perform email verification

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How to perform email verification

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