Comments on: PHP Email Validator – Email MX DNS Record Check

By: Cameron Algie

Cameron Algie — Sun, 05 Feb 2012 21:01:56 +0000

I know this is an old post but now that the “split” function has been deprecated. The following works.

function domain_exists( $email, $record = 'MX' ) { list( $user, $domain ) = explode( '@', $email ); return checkdnsrr( $domain, $record ); }

By: ram

ram — Sat, 12 Dec 2009 03:09:02 +0000

hi david
Is there anyway to check the user a/c also from that domain… and do u know how to login to webmail from website.I have done a form to collect user id and pass but its not passing to that webmail . if u have any reference or idea it woild be a great help for me

By: tiggsy

tiggsy — Mon, 02 Mar 2009 21:48:02 +0000

I have hunted around, and what you have given is the best that can be done, as one can’t rely on an email server being sufficiently insecure as to deny the existence of an email address. Many just swallow them without comment, but not all.

By: David Walsh

David Walsh — Mon, 02 Mar 2009 19:12:00 +0000

@tiggsy: You're correct but it at least prevents someone from using "user@adksjf8uwe4p8ujfasd.com".

By: tiggsy

tiggsy — Mon, 02 Mar 2009 19:02:16 +0000

This only checks if an email account can exist for the domain in question. For example I tested molly@frannleach.com and it came back valid. There is no email account of that name.

If my host is typical, all domains in an account will have the MX record set – which is why even domains I own with no email addresses attached have come back valid. Also most email addresses given by spammers are @gmail.com. This function, though it looks useful, has no validity as you will get false positives more often than false negatives.

By: Mark Sanborn

Mark Sanborn — Tue, 27 Nov 2007 17:55:43 +0000

Saved, for later use… :)

Thanks, Btw I like the way you display PHP code on your site.

Mark