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

<p>Adds a reCaptcha™ to your Mailster subscription forms.</p>
<p>You may also try <a href="https://wordpress.org/plugins/mailster-cool-captcha/" rel="ugc">Mailster Cool Captcha for Forms</a></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=reCaptcha" rel="nofollow ugc">Mailster Newsletter Plugin for WordPress</a></p>


Mailster reCaptcha


It looks like this plugin is not working anymore, a lot of spam registration even with reCaptcha activated.


Stop working

Adds a reCaptcha™ to your Mailster subscription forms.

Mailster Email Verify vs Mailster reCaptcha