MailboxValidator

<p>This email validation plugin helps you to block disposable email, free email, invalid email or role-based email from using your services or input form.</p>
<p>It helps to block spam, temporary emails and invalid email address messing around your site. You don’t have to master the hard part of adding shortcode into page source to use this plugin, but to activate, configure and you’re ready to prevent all spam signups from invalid email addresses.</p>
<p>You can <a href="https://www.mailboxvalidator.com/plans#api" title="MailboxValidator API key sign up" rel="nofollow ugc">sign up for a free API key</a> at mailboxvalidator.com, that will allow you to validate up to 300 emails every month for free!</p>
<h4>Supported Plugins</h4>
<ul>
<li>Contact Form 7</li>
<li>MailChimp</li>
<li>Formidable forms</li>
<li>WooCommerce</li>
<li>JetPack comments and contact form</li>
<li>Profile Builder</li>
<li>Ultimate Member registration form</li>
<li>Users Ultra registration form</li>
<li>Theme My Login</li>
<li>WP-Members</li>
<li>Paid Membership Pro</li>
<li>Visual Form Builder</li>
<li>Easy Digital Downloads registration form</li>
<li>and other plugins that yet come under our radar</li>
</ul>
<h4>Key Features</h4>
<ul>
<li>Accurate email verification result</li>
<li>Block invalid email.</li>
<li>Block disposable email.</li>
<li>Block free email.</li>
<li>Block role email.</li>
<li>Support domain blacklisting.</li>
</ul>
<p>This email verification plugin needs a MailboxValidator API key to work. You can get a free API from <a href="https://www.mailboxvalidator.com/plans#api" title="MailboxValidator API key sign up" rel="nofollow ugc">MailboxValidator</a>.</p>


MailboxValidator Email Validator

Email verification for WordPress forms. Block disposable, block spam, block invalid email, block free email and role-based email.

BaiatuLuTata

<p>String Replacer lets you define pairs of strings to search and replace across your WordPress site — including content, post titles, footer text, and outgoing emails. It works instantly and includes a simple admin interface for managing replacements.</p>
<h3>Features</h3>
<ul>
<li>Replace strings in:
<ul>
<li>Post <strong>titles</strong></li>
<li>Post <strong>content</strong></li>
<li>Site-wide output (e.g., <strong>footer</strong>, <strong>widgets</strong>, etc.)</li>
<li>Outgoing <strong>emails</strong> (<code>wp_mail()</code>)</li>
</ul>
</li>
<li>Simple <strong>admin UI</strong> with:
<ul>
<li>Add/remove rows</li>
<li>Live search</li>
<li>Pagination</li>
</ul>
</li>
<li>Replaces email addresses and works inside <code>mailto:</code> links</li>
<li><strong>Preserves leading and trailing spaces</strong> in replacement strings</li>
<li>Supports multilingual and branding replacement use cases</li>
<li>Fully local, compliant with WordPress plugin guidelines</li>
</ul>
<h3>Usage</h3>
<ol>
<li>In the admin screen, add one or more rows:
<ul>
<li>“Original String” (e.g., <code>Hello</code>)</li>
<li>“Replacement String” (e.g., <code>Bonjour</code>)</li>
</ul>
</li>
<li>Save your changes.</li>
<li>The plugin will handle replacements in frontend output and emails automatically.</li>
</ol>
<h3>Examples</h3>
<ul>
<li>Replace <code>support@oldsite.com</code> <span aria-hidden="true" class="wp-exclude-emoji">→</span> <code>help@newbrand.com</code></li>
<li>Replace <code>Hello</code> <span aria-hidden="true" class="wp-exclude-emoji">→</span> <code>Bonjour</code></li>
<li>Replace <code>ACME Inc.</code> <span aria-hidden="true" class="wp-exclude-emoji">→</span> <code>NewCorp</code></li>
<li>Replace <code>"Hello "</code> (with a space) <span aria-hidden="true" class="wp-exclude-emoji">→</span> <code>"Hi "</code> (space preserved)</li>
</ul>
<h3>Filters & Extensibility</h3>
<p>This plugin hooks into:<br />
– <code>the_title</code> and <code>the_content</code><br />
– <code>template_redirect</code> output buffering<br />
– <code>wp_mail</code> filter (subject, message, and headers)</p>
<p>Developers can use <code>STRIRE_replace_strings( $text )</code> to apply replacements manually in custom contexts.</p>
<h3>Author</h3>
<p>Created by <strong>Ionut Baldazar</strong><br />
GitHub: https://github.com/baiatulutata<br />
Email: baiatulutata@woomag.ro</p>


String Replacer


and it is absolutely awesome! you can take out unwanted links or change that weird label that you don't know where it is coming from 


i made this plugin

Replace any string visible to site visitors or found in outgoing emails—titles, content, footers, and more. Comes with a dynamic admin interface.

MailboxValidator Email Validator vs String Replacer