Chema

<p>Email Validator is a FREE lightweight and high-performance WordPress plugin that provides real-time email address validation during registration and form submissions on your website. It efficiently detects disposable email addresses and guarantees that only valid email addresses are accepted, enhancing the integrity of your user data.</p>
<h3>Features</h3>
<ul>
<li>Validates email addresses in real-time.</li>
<li>Prevents registration with disposable email addresses.</li>
<li>Checks for valid email format using RFC 822.</li>
<li>Verifies DNS MX records for email domains.</li>
</ul>
<h3>Usage</h3>
<p>Email validation is automatically applied during user registration and other form submissions. If an invalid or disposable email address is entered, users will be notified of the issue and asked to provide a valid email address.Email Validator is free software distributed under the terms of the GNU General Public License. For more information, visit <a href="https://www.gnu.org/licenses/gpl-3.0.html" rel="nofollow ugc">the official GPL page</a>.</p>
<p>Uses https://github.com/ivolo/disposable-email-domains/ to get an updated list of disposable email domains.</p>
<p>For support and feedback, please visit the <a href="https://wordpress.org/plugins/email-validator/" rel="ugc">plugin page on WordPress.org</a>.</p>


Better Email Validator

Email Validator is a FREE lightweight and high-performance WordPress plugin that provides real-time email address validation during registration and f …

doublesharp

<h4>Validated Field Add-On</h4>
<p>The <strong>Validated Field</strong> add-on for <a href="https://wordpress.org/extend/plugins/advanced-custom-fields/" rel="ugc">Advanced Custom Fields</a><br />
provides a wrapper for other input types which allows you to provide client side input masking using the jQuery<br />
<a href="http://digitalbush.com/projects/masked-input-plugin/" rel="nofollow ugc">Masked Input Plugin</a>, server side validation using either PHP regular expressions<br />
or PHP code, the option of ensuring a field’s uniqueness for all posts by <code>post_type</code> and <code>meta_key</code>, <code>post_type</code>, or site wide, or a<br />
single post by meta_key, as well as marking a field as read-only. Edit your fields in the ACF Field Group editor and update code using the ACE.js<br />
IDE with autocomplete and syntax validation.</p>
<h4>Features</h4>
<ol>
<li><strong>Input Masking</strong> – easily set masks on text inputs to ensure data is properly formatted.</li>
<li><strong>Server-Side Validation</strong> – validate the inputs using server side PHP code or regular expressions.</li>
<li><strong>Uniqueness</strong> – ensure that the value being updated is not already in use.</li>
<li><strong>Repeater Fields</strong> – validated fields within a <a href="http://www.advancedcustomfields.com/add-ons/repeater-field/" rel="nofollow ugc">Repeater Field</a>.</li>
<li><strong>Read Only</strong> – specify a field as read-only allowing it to be displayed but not updated.</li>
<li><strong>WordPress Multi Language</strong> – compatible with multilingual sites using the WPML plugin.</li>
<li><strong>Conditional Logic</strong> – show and hide validated fields based on the values of other “switch” fields.</li>
</ol>
<h4>Compatibility</h4>
<p>Requires <a href="https://wordpress.org/extend/plugins/advanced-custom-fields/" rel="ugc">Advanced Custom Fields</a> version 4.0 or greater.</p>


Advanced Custom Fields: Validated Field

Adding my one star to inform people that this plugin is no longer working

Doesn't work in ACF Pro 5.6.2

The Validated Field add-on for Advanced Custom Fields provides input masking and server-side validation of other field types.

Better Email Validator vs Advanced Custom Fields: Validated Field