MailboxValidator Email Validator

MailboxValidator Email Validator

Developed By hexasoft

Compatible with WHMCS v8.10

MailboxValidator Email Validator


This email validation plugin enables user to reduce invalid sign up by detecting disposable email, free email or role-based email from using your services.

Validating spam, temporary emails and stop visitors signing up with fake email address is important to businesses. To use this email lookup plugin, all you need to do is to enable it and you’re ready to go!

You can sign up for a free API key at, that will provide you to validate up to 300 emails every month for free!

Key Features

  • Block invalid email.
  • Block disposable email.
  • Block free email.
  • Block role email.


How to install the add-on?

  1. Upload all files under whmcs/ to WHMCS installation folder.

  2. In WHMCS admin page, Setup > Addon Modules, activate MailboxValidator Email Validator.

  3. Configure the addon to enable Full Administrator access.

  4. Go to Addons > MailboxValidator Email Validator for further customization.

  5. This addon required MailboxValidator API Key in order to work. Get a free API key from

How can this addon help to validate register form?

This addon will validate those email and make sure that it is valid or not belong to disposable, free email or role-based. In other words, it will reject those email which is invalid, disposable or free email, depends on your settings.

What is role-based email address?

A role-based email address is the email address that front part like admin@, sales@, support@ and so on.

Can I customize the error message for invalid email address?

Yes, you can customize the error message for invalid, disposable, free and role-based email address via the setting page.



5 stars
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1 star

Bradley Porter @customer862

August 20, 2021 at 08:42:17 PM

Seems like a good product in the fight against bogus sign-ups. Loaded the product onto WHMCS 8.2 and tested with good success. Hooked into the order form + client registration form and validated emails before submission. Very nice, and would like to see it expand with a few more features.

  • 2 years ago
  • Version Number 1.0.1

Hosting VPS @hosting8215

February 26, 2021 at 07:09:20 PM

nice module

  • 3 years ago
  • Version Number 1.0.0

Roberto @roberto8938

February 8, 2021 at 04:26:31 PM

Outstanding Module

  • 3 years ago
  • Version Number 1.0.0

Version Compatibility

Compatible with WHMCS v8.10

Full Version Compatibility

  • Selected versions of WHMCS v8.10
  • Selected versions of WHMCS v8.9
  • Selected versions of WHMCS v8.8
  • Selected versions of WHMCS v8.5
        8.5.0 - 8.5.1
  • All versions of WHMCS v8.4
  • All versions of WHMCS v8.3
  • All versions of WHMCS v8.2
  • All versions of WHMCS v8.1
  • All versions of WHMCS v8.0
  • All versions of WHMCS v7.10
  • All versions of WHMCS v7.9

Support for this product

The best place to start if you need help with a specific product is to contact the developer. All WHMCS Marketplace developers have both a website and support URL listed.

Developed By hexasoft


v1.1.1 Released April 23rd, 2024

Latest Version

  • Fix a bug where the module name is incorrect in WHMCS admin area.
  • Update the installation instructions in readme file to the latest.


Previous Versions

v1.1.0 Released November 23rd, 2023

View/hide detailed changelog

  • Updated MailboxValidator API to v2.
  • Updated decsription for certain configuration fields.


v1.0.1 Released April 7th, 2021

View/hide detailed changelog

Minor fix.


v1.0.0 Released July 14th, 2020

View/hide detailed changelog

  • Initial Release


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SMS Manager

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SMS Alert

Send automated SMS alert from WHMCS, and verify users mobile with OTP