mmediasoftwarelab

Deliverability Inspector is a free diagnostic tool that helps you verify your email authentication and deliverability configuration. Ensure your emails reach the inbox by checking all critical DNS records and SMTP settings.
Key Features:
<ul>
<li>SPF Record Check – Verify Sender Policy Framework configuration</li>
<li>DKIM Verification – Check DomainKeys Identified Mail with custom selector support</li>
<li>DMARC Policy Check – Validate Domain-based Message Authentication</li>
<li>MX Records – Confirm mail exchange servers are configured</li>
<li>PTR/Reverse DNS – Check server IP reverse DNS lookup</li>
<li>SMTP Test – Send test emails to verify mail delivery works</li>
</ul>
Perfect For:
<ul>
<li>WordPress site owners sending transactional emails</li>
<li>Email marketers ensuring deliverability</li>
<li>Developers setting up new WordPress installations</li>
<li>Anyone troubleshooting email delivery issues</li>
</ul>
Why Use Deliverability Inspector?
Email deliverability is critical for WordPress sites. Whether you’re sending order confirmations, password resets, or newsletters, proper email authentication prevents your messages from landing in spam folders.
This plugin provides a comprehensive dashboard showing the status of all major email authentication protocols in one place, with actionable recommendations for fixes.
Free & Open Source
Deliverability Inspector is completely free with no premium upsells required for core functionality. Use it to verify your email setup is production-ready.
Works With M Media Dispatch
Once your deliverability checks pass, consider using <a href="https://www.mmediasoftwarelab.com/product/mmedia-dispatch/" rel="nofollow ugc">M Media Dispatch</a> to send professional email campaigns via your own SMTP server – no recurring email marketing costs!
<h3>External services</h3>
This plugin connects to Google’s public DNS over HTTPS (DoH) API as a fallback when the server’s native DNS resolver cannot retrieve records.
Service: Google Public DNS over HTTPS 
Purpose: Resolving TXT, MX, and A DNS records for the domain being checked (SPF, DKIM, DMARC, MX lookups) when PHP’s <code>dns_get_record()</code> returns no results. 
What is sent: The domain name being queried and the DNS record type requested. 
When it is sent: Only when native DNS resolution fails for a given check. No data is sent on most servers where native DNS works correctly. 
Provider: Google LLC 
Terms of service: https://developers.google.com/terms 
Privacy policy: https://policies.google.com/privacy
No personal user data (names, emails, IP addresses of site visitors, etc.) is ever sent to this service – only the domain name being inspected.
<h3>Privacy Policy</h3>
Deliverability Inspector performs DNS lookups and optional SMTP tests using your WordPress server. No data is sent to external services except:
<ul>
<li>DNS queries to public DNS servers (standard internet protocol)</li>
<li>Optional test email via your configured SMTP server</li>
</ul>
No personal data is collected, stored, or transmitted to M Media or any third parties.
<h3>Support</h3>
For support, visit <a href="https://www.mmediasoftwarelab.com/support/" rel="nofollow ugc">M Media Support</a>
<h3>Credits</h3>
Developed by <a href="https://www.mmediasoftwarelab.com/" rel="nofollow ugc">M Media</a>

M Media Email Deliverability Inspector

Comprehensive email deliverability diagnostics tool - checks SPF, DKIM, DMARC, PTR, MX records, and SMTP configuration.

Antonino Piazza

Stefano Varesi

Nicola VoT Selenu

Our Deliverability Plugin for WordPress allows you to easily authenticate emails generated from your website with a DKIM signature.
But our Deliverability Plugin does much more than that! In fact, it’s packed with incredible email security and email deliverability features such as:
<ul>
<li>SPF authentication check, monitor and troubleshoot</li>
<li>DKIM authentication implementation, check, monitor and troubleshoot</li>
<li>DMARC authentication check, monitor and troubleshoot</li>
</ul>
It’s always a good practice to authenticate your domain, but if your domain has a DMARC record and your website runs on WordPress you almost certainly need this plugin.
The Deliverability plugin will take your Email Deliverability to a whole new level.
This plugin is designed and written by experts and is easy to use and understand.
It reduces security risk by checking for shortcomings in your email setup, and by implementing and enforcing the latest recommended Email security practices and techniques.
Fully compatible with Contact-Form 7, WPForms, BuddyPress, WP Mail SMTP and more.

Deliverability – pass DKIM, SPF, DMARC & more


Of course I might be biased, but I believe this is a must-to-have plugin to protect your brand and digital identity or just to increase the chances to land in the recipient's inbox.


A must to have plugin :)


Excellent dashboard with lot of informations. I used it to fix the deliverability configuration of my website. After that, I didn't receive any complaint from my users about my emails marked as spam in their inbox.



Really effective!


Great plugin


The plugin is very well made and the code is organized and clean which is truly a plus, an added value in the sea of plugins that often bring down the performance of websites due to the poor quality of the written code.



It helps a lot in his mission. Especially the less experienced, but also professionals will have to do less expensive work to optimize mail delivery.



I highly recommend trying it to all users who have problems with mail delivery from their WordPress site and who have to struggle with this annoying problem every day.



A Swiss Army Knife for optimizing email deliverability, with practical tips that guide you step-by-step through the entire process of tracking effective email delivery.


It makes checking email deliverability a breeze


The plugin offers a straightforward and user-friendly experience. Following the simple instructions in the settings page, I successfully added the TXT record to my DNS and my emails were successfully signed. I particularly appreciate the delivery chart and the dashboard, which provide valuable insights on my email deliveries and how to enhance it. These features empower me to ensure a safer and more reliable communication to my customers.


A standout plugin


Unfortunate I do not recieve any email for verifications my account. Tried on different installations and different emails.


Cant make account

Check and improve your Email Deliverability. Pass DMARC by DKIM-signing your emails without an external SMTP. Comply with Google & Yahoo requirements!

M Media Email Deliverability Inspector vs Deliverability – pass DKIM, SPF, DMARC & more