turtlepod

<a href="http://genbumedia.com/plugins/fx-email-log/" rel="nofollow ugc">f(x) Email Log</a> is a simple plugin to log all email sent via WordPress.
Simply visit “Tools > Email Log” Admin Page to see all your email logs. You can delete the log manually or bulk. It will log all your email including the one sent by your favorite contact form plugins.
Features:
<ol>
<li>Easy to use.</li>
<li>No ads. No bloated features.</li>
<li>Fully featured. You can delete/bulk delete logs and search logs.</li>
<li>Free, Open Source, GPL v2.0 or later license. 🙂 Use it to make something cool.</li>
<li>Support available at <a href="http://genbumedia.com/contact/?about=f%28x%29+Email+Log" rel="nofollow ugc">Genbu Media</a>. 
Notes for developer: </li>
</ol>
<h4>Github</h4>
Development of this plugin is hosted at <a href="https://github.com/turtlepod/fx-email-log" rel="nofollow ugc">GitHub</a>. Pull request and bug reports are welcome.
<h4>Other Info</h4>
This plugin is a fork of Email Log Plugin by Sudar Muthu 
Released under GNU General Public License, version 2. 
Copyright 2009 Sudar Muthu (email : sudar@sudarmuthu.com) 
http://sudarmuthu.com/wordpress/email-log

f(x) Email Log

Best of breed

Simple plugin to log all email sent via WordPress.

Timothy Jacobs

WP Mail Debugger captures and displays all emails sent through wp_mail() for debugging and troubleshooting. A new admin menu, WP Mail Debugger, is added under the Tools menu.
Get the <a href="https://apps.apple.com/us/app/wp-mail-debugger/id1547093438?mt=12" rel="nofollow ugc">Mac App</a> to connect to multiple WordPress websites from one convenient location.

WP Mail Debugger

I "found" this plugin when its creator presented it at WCPhx 2020. Its extremely easy to use, and is helpful in a day and age when SPFF and DKIM issues make debugging mail tough. Show your users the mail is going out. Or as a plugin developer, use it to review output.

This is so good

WP Mail Debugger captures and displays all emails sent through wp_mail() for debugging and troubleshooting.

f(x) Email Log vs WP Mail Debugger