Deliverability Email Validation


Deliverability Email Validation is an advance email validation engine that can test email address if it really exists.


How Email Validation Engine Works ?

  • Each email’s domain are checked if they exists.
  • MX Records of those domains are checked.
  • Check if it is disposable / temp email address.
  • If both domain and MX records pass the test, then we test the email via SMTP.

How it is usefull ?

  • It helps to block spammers. Spammers mostly use fake / temp email addresses.
  • Remind genuine user of their email if there is some typos.
  • Block Free Email Address Provider like / / if you want to.
  • Never miss a lead due to undeliverable email address.
  • Stop spam comments / users registration / forum post using fake emails.
  • Saves your time and hassle going through those spammy form submissions.

Our plugin extends is_email() validation rule of wordpress plugin. So any other form plugin that uses this function works with our email checker.

  • Contact Form 7
  • Gravity Forms
  • WordPress Registration
  • WordPress Comments
  • Any many more which uses is_email wordpress function.

All the email checking is done in our dedicated server and you don’t need to worry about your IP getting blocked due to the check. We handle all this for you.

Please generate the API key from here. API key is need to connect to our server for the email check.

For any issue, please visit our dedicated support forum.

Privacy Policy : We don’t store any email during the email check process. Only you API key details (Name, Email, API Key) are stored in our server.


  • Admin Panel Settings


  1. Upload the plugin files to the /wp-content/plugins/ directory
  2. Activate the email checker plugin through the ‘Plugins’ menu in WordPress.
  3. Select you package, get the API key and verify it from Settings > Email Checker.


Why it is a premium plugin ? Some also offer free serivce.

SMTP based email validation is time taking & expensive process. We need to maintain our servers reguallry so that the SMTP validation can be done smoothly. Most Free plugins store email address and they make money out of those data. However, it is not the case with us.

Can it check all email addresses ?

We gurantee email check success rate of more than 95%. However, for email address we can’t validate we will mark it as valid so that you don’t lose any submissions.

How can i block Free Email Address Provider ?

From our pugin setting page, there is an option to disable Free Email Address. Also, we have option to enable / enable Disposable / Temporary Emails and Catch All Emails.

How much reliable is this ? What happens if the email check server is down ?

We use cloud based server for email check and they are super reliable. In case of any server failure, default email validation continue to work as normal. There won’t be any interuption for email submission in your site.


September 3, 2016
I am using this plugin in my own site from last 2 weeks and it is really helping me much. Less spam and only valid email. I was irritated with email such as But no more. Disclaimer : I am developer of this plugin and using it in my own site. Thanks
Read all 1 review

Contributors & Developers

“Deliverability Email Validation” is open source software. The following people have contributed to this plugin.




  • New Roboust Email Validation Engine


  • Support for old version of PHP.


  • Added settings link in plugin list.


  • First Release