Comments on: How to check if an email address exists without sending an email?

By: tim

tim — Sun, 27 Jun 2010 20:28:39 +0000

Well…. this is a nice feature to have. Though you should only use it to hint the user to pay extra close attention to their input. As this method of validation is not failsafe, you should only indicate a possibly incorrect email address, and not blocking the user from using it anyway.

By: MySQL programmer

MySQL programmer — Wed, 23 Jun 2010 12:39:09 +0000

This is nice posting. Its helping to many friends say to me.
Doing good..

Thanks a lot..!

By: r.davison

r.davison — Sun, 13 Jun 2010 15:10:28 +0000

nick 9th june is so right I am always having this problem

By: Nick

Nick — Wed, 09 Jun 2010 07:57:57 +0000

I’ve just had an odd situation. I was buying an Apple product through Apple Finance (Barclays Bank). The tool they use to process the application validates the email address before accepting it. It failed to validate my email address on harper.org.uk and it also failed to validate my google mail address. I’ve also had issue with other companies attempting to validate email addresses and this validation failing for these two domains, particularly Vodafone’s Blackberry servers and an electronic magazine that I have attempted to subscribe to. There appears to be a common problem out there with email validation.

By: Christian

Christian — Tue, 08 Jun 2010 21:02:39 +0000

One again, your idea is very

good.thank you!very much.

By: babor_7uiu

babor_7uiu — Mon, 07 Jun 2010 10:09:27 +0000

Thanks for sharing. It’s important information for SEO people.

By: jitin dhingra

jitin dhingra — Fri, 21 May 2010 04:51:53 +0000

Hello Everyone,

I want to validate my bunch of email addresses, some free softwares can validate only max 50 email id’s at one go and takes time for validation. Can any one of you tell me if you have any such software which is available free and validate my email ids, your support will be appreciated. thanks a bunch in advance.

By: keith

keith — Sun, 25 Apr 2010 10:12:22 +0000

In real terms the function:
$emailIsValid = filter_var($email, FILTER_VALIDATE_EMAIL);

doesnt work (does what is says on the tin but doesnt ‘check). This will allow anything that sits within standard. That means that anything that is correctly formatted will go through, doesnt have to be an actual valid address. For example xxx@staleproperty.com.uk will go through, it is valid because the RFC defines this as ok (allowing for future growth in the standard) but the reality is it is not valid because ‘.com.uk’ is not a valid base domain.

By: Theo Hubenet

Theo Hubenet — Fri, 26 Mar 2010 13:55:27 +0000

For all of your peoples information… I see many regular expression checks that do not correctly check the domain extension length, for example the .museum domainname extension length is 6 characters and the minimum length is two:
function check_email($email) {
$rx =”^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,8})$”;
return eregi($rx,$email);
}

By: MLM Software Cochin

MLM Software Cochin — Tue, 16 Mar 2010 10:54:18 +0000

Thank you for the great information. I have been searching for this question and finally got it.