EverPress

<p>Verifies your subscribers email addresses. Read more on the <a href="https://kb.mailster.co/reduce-false-signups-with-email-verification/?utm_campaign=wporg&utm_source=Email+Verify+for+Mailster&utm_medium=readme" rel="nofollow ugc">Mailster Knowledge base</a></p>
<p>This plugin is no longer needed since Mailster 3.0!</p>
<h3>Additional Info</h3>
<blockquote>
<p>This Plugin requires <a href="https://mailster.co/?utm_campaign=wporg&utm_source=Email+Verify+for+Mailster&utm_medium=readme" rel="nofollow ugc">Mailster Newsletter Plugin for WordPress</a></p>
</blockquote>


Mailster Email Verify

The plugin will reject the email address if there is no such domain, but the SMTP ping to see whether the actual email address exists or not doesn't work.
Without this, it's not really useful.

MX checking works, SMTP doesn't

Verifies your subscribers email addresses. Read more on the Mailster Knowledge base

Xaver

Mailster Newsletter Plugin

<blockquote>
<p>This Plugin requires <a href="https://mailster.co/?utm_campaign=wporg&utm_source=wordpress.org&utm_medium=readme&utm_term=Gmail" rel="nofollow ugc">Mailster Newsletter Plugin for WordPress</a></p>
</blockquote>
<p>Uses Gmail to deliver emails for the <a href="https://mailster.co/?utm_campaign=wporg&utm_source=wordpress.org&utm_medium=readme&utm_term=Gmail" rel="nofollow ugc">Mailster Newsletter Plugin for WordPress</a>.</p>
<p>Read the <a href="https://kb.mailster.co/send-your-newsletters-via-gmail?utm_campaign=wporg&utm_source=Gmail&utm_medium=readme" rel="nofollow ugc">Setup Guide</a> to get started.</p>
<h3>Additional Info</h3>
<p>This Plugin requires <a href="https://mailster.co/?utm_campaign=wporg&utm_source=wordpress.org&utm_medium=readme&utm_term=Gmail" rel="nofollow ugc">Mailster Newsletter Plugin for WordPress</a></p>


Mailster Gmail Integration

Does not work! The problem has been known for a long time, but the developer is silent.
Fatal error: Uncaught Error: Call to undefined function Mailster\GuzzleHttp\Psr7\uri_for()
in /home/admin/web/…../public_html/wp-content/plugins/mailster-gmail/vendor/google/auth/src/OAuth2.php on line 1129

Does not work!

Uses Gmail to deliver emails for the Mailster Newsletter Plugin for WordPress.

Mailster Email Verify vs Mailster Gmail Integration