This plugin enhances the security and stability of your WordPress installation by delaying and controlling wp_mail() email submissions through a managed queue.
If your site exhibits unusual behavior — such as a spam bot repeatedly submitting forms — you will be alerted immediately.
<ul>
<li>Intercepts wp_mail() and places outgoing messages in a queue</li>
<li>Configure how many emails are sent and at what interval</li>
<li>Log all queued email submissions</li>
<li>Receive alerts when the queue grows unexpectedly</li>
<li>Receive alerts when WordPress is unable to send emails</li>
</ul>

Mail Queue

Take control of emails sent by WordPress. Queue outgoing emails and get notified instantly if your website is trying to send too many emails at once!

slaughterlt

Mailer slowly send emails to users when your website is visited. It keep the email flow within provided limits.
Mailer is compatible with WordPress and every plugin.

Mailer

Mailer queues and throttles emails from WordPress to keep the email flow within provider limits. Every new registered user if email sending is enabled …

Mail Queue vs Mailer