Email Checker for Contact Form 7


This plugin enables Contact Form 7 users to check their client’s email addresses before accepting their messages via the contact form which stops spam and promotional emails from your inbox. It uses Emails Checker real-time email validation service to check if an email address valid or not in order to reduce invalid inboxes. It will only allow a valid email address users to send you email addresses. You can sign up for a free API Access key at to using this plugin.

Note: Contact Form 7 must be installed and activated before using this Email Checker for Contact Form 7.

Key Features

  • DNS validation, including MX record lookup
  • Disposable email address detection realtime
  • Misspelled domain detection
  • Email Syntax verification (IETF/RFC standard conformance)
  • Mailbox existence checking
  • Catch-All Testing
  • Greylisting detection
  • SMTP connection and availability checking

Enable you to block the users from message sending if failed invalidation.
This plugin needs an Emails-Checker.NET API key to work. You can get it from here.


Our Plugin will automatically check your contact form emails syntax FREE. Only SMTP Checks will cost credit.


  • Email Checker in Action
  • Email Checker Settings Page
  • Email Checker API Credits and Statics


Manual Installation

  1. Unzip and upload the email-checker-for-cf7 folder to the /wp-content/plugins/ directory.
  2. Activate the Email Checker for Contact Form 7 plugin through the ‘Plugins’ menu in WordPress.
    1.Configure the plugin by going to Settings > Emails Checker for CF7.
  3. Signup for a account (First 100 smtp credits are free every month).
  4. Login, copy, and paste your public API key to Settings > Emails Checker for CF7 page.

Perguntas frequentes

How many Emails I can check?

Our Free Plan will give you 100 SMTP Credits for free to check SMTP Status.
If you have more than 100 Contact Form Submission per month check our affordable pricing at

Do I have to do any changes in my form?

Our plugin is very simple to use. Just enter your API Access key are you are done. The plugin will automatically filter all Contact Form 7 Emails

What if I ran out of credits?

If you run out of credits our plugin will stop checking emails. Your Contact form functionality will not stop.


22 Janeiro, 2022 1 reply
This is not a verifier of email in real time. Don’t waste your time if that is what you are looking for.
22 Outubro, 2020
I was very frustrated by getting spam bot emails from my website’s contact forms. Then I realized the bots are not using real emails in the contact form. So filtering invalid emails can solve the problem I taught and it really did. Now I only get valid and important emails and messages from my website.
Ler todas as 2 avaliações

Contribuidores e programadores

“Email Checker for Contact Form 7” é software de código aberto. As seguintes pessoas contribuíram para este plugin:


Registo de alterações


  • Initial release.


  • Connectivity Issue Fixed.
  • Added More Security Factors.


  • Fixed minor field issues


  • Addeded Newer version of Emails Checekr Api
  • New Block emails on Errors option


  • API Updates
  • Minor CSS and Form security Improved



  • Updated for newer wordpress version 6.1.1
  • Added Option to allow specific email types
  • Added Option to block emails if out of credits
  • Added more email catching abilities


  • Updated for newer wordpress version 6.4.2
  • Fixed minor issues


  • Updated for newer wordpress version 6.6
  • Improved contact form email field detection and validation