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 emails-checker.net 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.

Note:

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