Raul

<a href="https://www.unifiedsoftware.co.uk/solutions/email-validation-and-verification/" rel="nofollow ugc">EmailVal</a> is Unified Software’s <a href="https://www.unifiedsoftware.co.uk/solutions/email-validation-and-verification/" rel="nofollow ugc">email validation & verification</a> software. It’s an essential cloud-based solution that allows companies to instantly check the validity of email addresses entered by customers.
EmailVal is a web service. That means the <a href="https://www.unifiedsoftware.co.uk/solutions/email-validation-and-verification/" rel="nofollow ugc">email validation & verification software</a>, the dynamic validation rules and reference data, are all located on the EmailVal servers.
This plugin enables you to interact with EmailVal through an easy to use form optimised for all screen sizes that you can place anywhere on your website via a shortcode. Visitors to your website can then use the form to input email addresses which will be automatically validated against EmailVal and stored in a database table of your choice for future reference.

EmailVal – Email Address Validation & Verification

EmailVal is the easiest way to validate and store email addresses

b4ecommerce

A lightweight plugin that checks for the most common email typos in the customer’s email and provides them with a warning. Using this plugin your customers will be much more likely to enter a valid email address, which will simplify and improve your order management.
USAGE 
You don’t need to configure the plugin, just upload and activate it and it’s ready to go.
CURRENTLY CHECKING FOR THE FOLLOWING EMAIL DOMAINS
<ul>
<li>Gmail</li>
<li>Hotmail</li>
<li>Outlook</li>
<li>Protonmail</li>
<li>Yahoo</li>
</ul>

Checkout email validation for WooCommerce

A lightweight plugin that checks for the most common email typos in the customer's email and provides them with a warning.

EmailVal – Email Address Validation & Verification vs Checkout email validation for WooCommerce