kimpenhaus

WP-Mail-Validator is an anti-spam plugin. It provides mail-address validation in 5 ways:
<ol>
<li>syntax of mail-addresses</li>
<li>mailserver host</li>
<li>mx-record of mailserver</li>
<li>user-defined blacklist</li>
<li>trashmail services</li>
</ol>
Once the plugin identifies a mail-address to be non existing on the mailserver or being on the blacklist or 
from trashmail service, any comment being made is moved to the spam area awaiting moderation from the blog owner.
<h3>Theme-Modification</h3>
WP-Mail-Validator comes with 3 theme functions that can be used:
<ol>
<li><code>wp_mail_validator_info_label()</code>: shows a protected by info label</li>
<li><code>wp_mail_validator_version()</code>: shows the current plugin version</li>
<li><code>wp_mail_validator_fended_spam_attack_count()</code>: shows the count of spam attackes fended</li>
</ol>

WP-Mail-Validator

WP-Mail-Validator is an anti-spam plugin. It provides mail-address validation in 5 ways:

IsTempMail

This plugin will verify every email address submitted by users. 
It’ll automatically detect and block disposable, temporary email addresses. 
It’ll give a nice warning message when users are signing up, logging in, 
or changing email to a temporary email.
The plugin checks the domain name using a service named 
<a href="https://www.istempmail.com/?ref=wp" rel="nofollow ugc">IsTempMail</a>. 
If a domain name is blocked, it will be stored into a local blacklist. 
You can also manage your own local whitelist and blacklist to allow or 
disallow certain domains.
The plugin integrates with the WordPress built-in function <code>is_email()</code>. 
It works seamlessly with other plugins including WooCommerce, 
Contact Form 7, Gravity Form, Jetpack/Grunion contact forms, Kadence Blocks Forms as well as 
other formbuilders and ecommerce plugins and WordPress’ own registration form.

Block Temporary Email

This plugin stops users from giving you disposable or fake email addresses when signing up. This helps reduce spam and fraud.

WP-Mail-Validator vs Block Temporary Email