Shiv Srivastava

Ninja Test Email is a comprehensive email testing solution for WordPress that helps you verify your site’s email configuration is working correctly. Whether you’re troubleshooting SMTP issues, testing email deliverability, or monitoring outgoing emails, this plugin provides all the tools you need.
Why Ninja Test Email?
WordPress relies heavily on email functionality for user notifications, password resets, contact forms, and more. If emails aren’t sending properly, your site’s core functionality breaks down. Ninja Test Email gives you instant visibility into your email system with detailed logs, success/failure tracking, and comprehensive statistics.
Who Is This For?
<ul>
<li>WordPress administrators troubleshooting email issues</li>
<li>Developers testing email functionality during development</li>
<li>Site owners monitoring email deliverability</li>
<li>Agencies managing multiple WordPress installations</li>
<li>Anyone who needs to verify SMTP configuration</li>
</ul>
How It Works
Ninja Test Email integrates seamlessly into WordPress, logging all outgoing emails automatically while providing a dedicated interface for sending test emails. The plugin uses WordPress’s native wp_mail() function, ensuring compatibility with any SMTP plugin you’re already using (WP Mail SMTP, Easy WP SMTP, Post SMTP, etc.).
Technical Features
<ul>
<li>Modern React Interface: Built with React 18 and Tailwind CSS for a responsive, fast admin experience</li>
<li>REST API: Full REST API support for programmatic access to email testing and logs</li>
<li>Custom Database Table: Efficient email log storage with optimized queries</li>
<li>Automated Cleanup: Scheduled daily cron job to remove old logs based on retention settings</li>
<li>Translation Ready: Full internationalization support with 41 translatable strings</li>
<li>Shortcode Support: Frontend email testing via [ninja-test-email] shortcode</li>
<li>Search & Filtering: Powerful search across recipient, subject, and email body</li>
<li>Statistics Dashboard: Visual graphs showing success rates, daily volume, and trends</li>
</ul>
<h3>Features</h3>
Email Testing 
* Send plain text test emails 
* Send HTML test emails with custom formatting 
* Validate email addresses before sending 
* Customizable subject and message content 
* Default templates for quick testing
Email Logging 
* Automatic logging of all WordPress emails 
* Capture recipient, subject, and message body 
* Track success/failure status 
* Record timestamps for each email 
* Store email content for debugging
Dashboard & Statistics 
* Visual success rate graphs 
* Total emails sent counter 
* Today’s email count 
* Weekly email statistics 
* Monthly email volume 
* Status breakdown (sent vs. failed)
Log Management 
* Search across all email fields 
* Filter by date, recipient, or status 
* Sort by time, recipient, subject, or status 
* Paginated results for large datasets 
* Individual log deletion 
* Bulk log cleanup
Settings & Configuration 
* Configurable log retention period 
* Automatic cleanup scheduling 
* Daily, weekly, or monthly retention options 
* REST API health check endpoint 
* Cron status monitoring
Developer Features 
* REST API endpoints for all functions 
* Frontend shortcode [ninja-test-email] 
* Custom action hooks 
* Namespaced code (NinjaTestEmail) 
* Composer autoloading support 
* WordPress Coding Standards compliant
Performance & Security 
* Optimized database queries with caching 
* Prepared SQL statements for security 
* Capability checks (manage_options required) 
* Nonce verification on all actions 
* Input sanitization and output escaping 
* ABSPATH security checks

Ninja Test Email

Test your WordPress email configuration with detailed logging, statistics, and a modern React-powered interface.

JWardee

Logging your mail will stop you from ever losing your emails again! This fast, lightweight plugin (under 140kb in size!) is also useful for debugging or backing up your messages.
Just install and activate then all of your contact form emails will be logged and saved to your DB with no additional configuration required.
View and manage all your form submissions through the default WordPress interface. An email failed to send? With a single click you can resend the backed up email.
Send emails out directly from the WordPress interface. Also includes support for attachments.
Immediately find out if your contact form submission was successfully sent.
<h3>Features</h3>
<ul>
<li>Zero setup required – just install and away you go</li>
<li>Minimalistic – no overbloated features you never use weighing your site down – under 140kb in size!</li>
<li>Bulk export emails to CSV for easy inclusion into Excel or any other program</li>
<li>Compose new emails with the WordPress controls you’re already familiar with</li>
<li>Resend your emails in bulk</li>
<li>Debugging – see exactly which file and code line was responsible for sending the email, along with any errors encountered</li>
<li>Manage what user permissions can see the logs</li>
<li>Routinely have your logs cleared out at a specified time – or keep them forever</li>
<li>Need to be notified when there’s a problem sending your mail? We’ve got hooks that allow you to do just that</li>
<li>Completely free</li>
</ul>
<h3>Hooks and actions</h3>
<ul>
<li><code>wp_mail_catcher_mail_success</code> is triggered when a message is sent and logged successfully. It has a single argument that is an array containing the log
<ul>
<li><code>id</code> related to the id in the <code>mail_catcher_logs</code> MySQL table</li>
<li><code>time</code> relative, readable time to when the log was saved</li>
<li><code>email_to</code> the email address(es) that the message was sent to</li>
<li><code>subject</code> the subject line of the message</li>
<li><code>message</code> the contents of the message</li>
<li><code>status</code> an integer depicting if the message was sent successfully or not (1 = sent successfully. 0 = sending failed)</li>
<li><code>error</code> the error that occurred – if any</li>
<li><code>backtrace_segment</code> a json_encoded object that shows which file and line the mail was initially triggered from</li>
<li><code>attachments</code> a list of any attachments that were sent along with the email</li>
<li><code>additional_headers</code> a list of any headers that were sent</li>
<li><code>attachment_file_paths</code> a list of the location of any attachments that were sent</li>
<li><code>timestamp</code> a unix timestamp of when the email was sent</li>
<li><code>is_html</code> a boolean, that will be true if the message is a html email and false if not</li>
<li><code>email_from</code> the from value of the email</li>
</ul>
</li>
<li><code>wp_mail_catcher_mail_failed</code> is triggered when a message failed to send and logged successfully. It has a single argument that is an array containing the log (same as the arguments for <code>wp_mail_catcher_mail_success</code>)</li>
<li><code>wp_mail_catcher_deletion_intervals</code> is a filter that should return an array where each key is an amount of time in seconds, and the value is the label. Used to determine when a message has expired and should be deleted</li>
<li><code>wp_mail_catcher_before_success_log_save</code> is a filter that is called just before a successful log is saved. It has a single argument that is the transformed log that will be saved – use this to alter the log before it’s saved. Returning <code>false</code> will stop the log from being saved. Also note that this is fired even when an email has errored, because all logs are initially saved as “successful” before being possibly updated with an error (if applicable). This is because of the way the <code>wp_mail</code> and <code>wp_mail_failed</code> are implemented in WordPress.
<ul>
<li><code>time</code> a unix timestamp of when the email was sent</li>
<li><code>email_to</code> the email address(es) that the message was sent to</li>
<li><code>subject</code> the subject line of the message</li>
<li><code>message</code> the contents of the message</li>
<li><code>backtrace_segment</code> an array that shows which file and line the mail was initially triggered from</li>
</ul>
</li>
<li><code>wp_mail_catcher_before_error_log_save</code>
<ul>
<li><code>time</code> a unix timestamp of when the email was sent</li>
<li><code>email_to</code> the email address(es) that the message was sent to</li>
<li><code>subject</code> the subject line of the message</li>
<li><code>message</code> the contents of the message</li>
<li><code>backtrace_segment</code> an array that shows which file and line the mail was initially triggered from</li>
<li><code>error</code> the error that occurred</li>
</ul>
</li>
</ul>

Mail logging – WP Mail Catcher


Works great. It needs a some adjustments though on mobile screens.


Works Great


Really well done thank you!Very useful debug function with the code that sent the email!


Keeps track of all emails sent


Works perfectly as expected, every single time, for years and years!


The Best!

just perfect!


simple and lightweight. with this you have the absolute control over what was successfully send. besides that you can also send a manual email from the dashboard. nice


Perfect companion for wp mail smtp or wpo365


This is a great extension, and does everything that you need of an email logging extension. 



Very useful for debugging purposes!


Easy to use, with no bloat.


tested it for a few weeks and it's very fine, lite and fast.



only one small proposal: option to redirect an email - some users input their email wrong and admins can see this and redirect to the correct email address (ex. @yhoo.com instead of yahoo.com)


perfect for mail logging and preview

Stop from ever losing your emails again! This fast, lightweight plugin (under 140kb in size!) is also useful for debugging or backing up your messages

Ninja Test Email vs Mail logging – WP Mail Catcher