Super Duper Plugins

Super Duper SMTP Mail Bridge replaces the unreliable WordPress PHP mail function with a properly authenticated SMTP connection. Emails reach inboxes instead of spam folders or the void.
🇨🇭🇩🇪🇦🇹 Hinweis für DACH-Nutzer: Plugin und Support sind auf Deutsch (Schweiz/Deutschland/Österreich) verfügbar. Alle Texte und Einstellungen sind vollständig auf Deutsch übersetzt.
Unlike other SMTP plugins, this one gives you everything for free – no feature gates, no “upgrade to Pro” nags, no premium tiers. Every feature listed below works right out of the box.
<h4>Why choose this plugin over the big names?</h4>
Most popular SMTP plugins either lock essential features behind a paywall or are bloated with dozens of API integrations you don’t need. Here’s what makes Super Duper SMTP Mail Bridge different:
🛡️ Backup SMTP with Automatic Failover — WP Mail SMTP charges $49+/year for this. FluentSMTP and Post SMTP offer fallback, but our implementation automatically logs each failover event separately so you can see exactly when and why your primary server failed.
⏱️ Built-in Rate Limiting — No other free SMTP plugin offers this. Protect your domain reputation when a contact form gets spammed or a plugin goes rogue. Set limits per minute, hour, or day. Blocked emails are logged with a clear “Blocked” status.
🌐 Domain Control (Whitelist & Blacklist) — Block disposable email domains (tempmail.com, guerrillamail.com) or restrict sending to specific recipient domains only. No other free SMTP plugin has both whitelist AND blacklist for recipient domains.
🔐 AES-256-CBC Password Encryption — Your SMTP password is encrypted before it’s stored in the database. Most free SMTP plugins store credentials in plain text or use simple base64 encoding.
📋 Full Email Log with HTML Preview — View the actual rendered email in an iframe preview or switch to source code view. Filter by status (Success, Failed, Blocked, Failover). WP Mail SMTP charges for email logging. We include it free, with content.
🔧 SMTP Debug Transcript — Enable debug mode and get the complete SMTP server conversation logged for each email. Essential for troubleshooting – most plugins don’t offer this at all, or charge for it.
⚠️ Smart Admin Notifications — Get notified by email when failures exceed your threshold. Includes the last error details, recipient, and subject. Built-in loop prevention ensures the notification itself doesn’t trigger more notifications.
👁️ BCC Monitoring & GDPR/DSGVO Compliance — Automatically BCC all outgoing emails to one or more monitoring addresses. Combined with the email log, this provides legally verifiable proof that an email was actually sent – essential for GDPR (DSGVO) compliance. If a data subject ever disputes whether they received a notification, password reset, or consent confirmation, you have both the log entry and an independent BCC copy as evidence. No other free SMTP plugin offers this level of compliance-ready email auditing.
🚫 Zero Bloat — No setup wizards, no upsell banners, no affiliate links to email services, no tracking. Just a clean settings page, your SMTP config, and a log. Under 50 KB total plugin size.
<h4>Complete Feature List</h4>
<ul>
<li>SMTP configuration (host, port, TLS/SSL, authentication)</li>
<li>Configurable connection timeout (5–120 seconds)</li>
<li>Custom sender name and email address</li>
<li>Allowed sender domain validation</li>
<li>Backup SMTP server with automatic failover</li>
<li>Rate limiting (per minute, hour, or day)</li>
<li>BCC monitoring to one or more addresses</li>
<li>Recipient domain whitelist (only send to these)</li>
<li>Recipient domain blacklist (never send to these)</li>
<li>Admin error notification with configurable threshold</li>
<li>AES-256-CBC password encryption</li>
<li>Complete email log with status, headers, and error messages</li>
<li>HTML email preview (rendered) and source code view</li>
<li>SMTP debug transcript logging</li>
<li>Test email function directly from admin</li>
<li>Automatic log cleanup after configurable number of days</li>
<li>Clean uninstall – removes all data</li>
<li>Translations: German (CH/DE/AT), English, French, Spanish, Italian, Dutch</li>
</ul>
<h4>Feature Comparison</h4>
Here is how Super Duper SMTP Mail Bridge compares to the most popular SMTP plugins, feature by feature.
Legend: ✅ = included for free · 🔒 = paid / Pro only · ❌ = not available
Super Duper SMTP Mail Bridge (this plugin)
<ul>
<li>SMTP configuration: ✅</li>
<li>Email logging: ✅</li>
<li>Email content stored in log: ✅</li>
<li>Backup SMTP with automatic failover: ✅</li>
<li>Rate limiting (per minute / hour / day): ✅</li>
<li>Recipient domain whitelist: ✅</li>
<li>Recipient domain blacklist: ✅</li>
<li>BCC monitoring (GDPR/DSGVO proof): ✅</li>
<li>Strong password encryption (AES-256-CBC): ✅</li>
<li>SMTP debug transcript: ✅</li>
<li>Admin error alerts (failure threshold): ✅</li>
<li>Allowed sender domain validation: ✅</li>
<li>No ads / upsell in the admin: ✅</li>
</ul>
WP Mail SMTP
<ul>
<li>SMTP configuration: ✅</li>
<li>Email logging: 🔒</li>
<li>Email content stored in log: 🔒</li>
<li>Backup SMTP with automatic failover: 🔒</li>
<li>Rate limiting (per minute / hour / day): ❌</li>
<li>Recipient domain whitelist: ❌</li>
<li>Recipient domain blacklist: ❌</li>
<li>BCC monitoring (GDPR/DSGVO proof): ❌</li>
<li>Strong password encryption (AES-256-CBC): ❌</li>
<li>SMTP debug transcript: ❌</li>
<li>Admin error alerts (failure threshold): 🔒</li>
<li>Allowed sender domain validation: ❌</li>
<li>No ads / upsell in the admin: ❌</li>
</ul>
FluentSMTP
<ul>
<li>SMTP configuration: ✅</li>
<li>Email logging: ✅</li>
<li>Email content stored in log: ✅</li>
<li>Backup SMTP with automatic failover: ✅</li>
<li>Rate limiting (per minute / hour / day): ❌</li>
<li>Recipient domain whitelist: ❌</li>
<li>Recipient domain blacklist: ❌</li>
<li>BCC monitoring (GDPR/DSGVO proof): ❌</li>
<li>Strong password encryption (AES-256-CBC): ❌</li>
<li>SMTP debug transcript: ❌</li>
<li>Admin error alerts (failure threshold): ✅</li>
<li>Allowed sender domain validation: ❌</li>
<li>No ads / upsell in the admin: ✅</li>
</ul>
Post SMTP
<ul>
<li>SMTP configuration: ✅</li>
<li>Email logging: ✅</li>
<li>Email content stored in log: ✅</li>
<li>Backup SMTP with automatic failover: ✅</li>
<li>Rate limiting (per minute / hour / day): ❌</li>
<li>Recipient domain whitelist: ❌</li>
<li>Recipient domain blacklist: ❌</li>
<li>BCC monitoring (GDPR/DSGVO proof): ❌</li>
<li>Strong password encryption (AES-256-CBC): ❌</li>
<li>SMTP debug transcript: ✅</li>
<li>Admin error alerts (failure threshold): ✅</li>
<li>Allowed sender domain validation: ❌</li>
<li>No ads / upsell in the admin: ❌</li>
</ul>
YaySMTP
<ul>
<li>SMTP configuration: ✅</li>
<li>Email logging: ✅</li>
<li>Email content stored in log: ✅</li>
<li>Backup SMTP with automatic failover: ✅</li>
<li>Rate limiting (per minute / hour / day): ❌</li>
<li>Recipient domain whitelist: ❌</li>
<li>Recipient domain blacklist: ❌</li>
<li>BCC monitoring (GDPR/DSGVO proof): ❌</li>
<li>Strong password encryption (AES-256-CBC): ❌</li>
<li>SMTP debug transcript: ❌</li>
<li>Admin error alerts (failure threshold): ✅</li>
<li>Allowed sender domain validation: ❌</li>
<li>No ads / upsell in the admin: ❌</li>
</ul>
Every feature in Super Duper SMTP Mail Bridge is included for free — no premium tier, no feature gates.

Super Duper SMTP Mail Bridge

Reliable SMTP email delivery with backup failover, rate limiting, domain control, BCC monitoring, and full email log. 100% free.

Silkalns

WP Chill

Jack K

George Ciobanu

checkemail

In need of a tool that allows you to easily log and view all emails sent from WordPress? Check & Log might be just the solution for that. 
This WordPress plugin helps you store sent emails for auditing purposes, as well as debug email related problems in your WordPress site. Works best on eCommerce websites that have been created with WooCommerce or Easy Digital Downloads.
<a href="https://check-email.tech/" rel="nofollow ugc">Home</a> | <a href="https://check-email.tech/contact/" rel="nofollow ugc">Help & Tech Support</a> | <a href="https://check-email.tech/docs/" rel="nofollow ugc">Documentation</a> | <a href="https://check-email.tech/pricing/#pro-feature" rel="nofollow ugc">Premium Features</a>
<h3>New Features of the plugin Check & Log Email 2.0</h3>
<ul>
<li>Export Logs – It allows to export email logs in multiple file format with date range and status <a href="https://check-email.tech/docs/knowledge-base/how-to-export-email-logs-in-check-log-email-plugin/" rel="nofollow ugc">Learn More</a>. </li>
<li>More Fields – Such as Cc, Bcc, Host IP, Reply To etc. </li>
<li>Log Retention Period – It allows to deletes old emails when a certain amount of logs and time has passed. </li>
<li>Print or save as PDF – You can print the email log, or save it as a PDF. </li>
<li>Resend email – This feature allow you to modify email and resend email. </li>
<li>Forward Email – By using this feature you can automatically forward a copy of all emails sent by WordPress to other email addresses <a href="https://check-email.tech/docs/knowledge-base/forward-email-option-in-the-check-log-email-plugin/" rel="nofollow ugc">Learn More</a>. </li>
<li>Easy migration – It is allow you to import data from various plugins like Email Log, Mail logging – WP Mail Catcher, WP Mail Logging, WP Mail Log and export the data. </li>
<li>Email Error Tracking – You can easily see list of errors of emails and view details of error. </li>
<li>Setup Wizard – Wizard setup allows you to one time setup of this plugin. </li>
<li>Default Format for Message – Its allow you to Default Format for Message on view of content. </li>
<li>SMTP – Its allow you to setup your own smtp through Check & Email Log SMTP form. </li>
<li>Multisite Configure – Its allow to configure global setting for all your sites. </li>
<li>Encoding – Its allow to encode emails and phone in page content. </li>
<li>Outlook / MS 360 – Its allow to send email using 360 / outlook configuration <a href="https://check-email.tech/docs/knowledge-base/microsoft-365-outlook-smtp-support-in-check-log-email/" rel="nofollow ugc">Learn More</a>.</li>
<li>Gmail SMTP – Its allow to send email gmail configuration <a href="https://check-email.tech/docs/knowledge-base/gmail-smtp-support-in-check-log-email/" rel="nofollow ugc">Learn More</a>. </li>
<li>Email Spam Testing – Its allow to testing of your mail for accurate delivery <a href="https://check-email.tech/docs/knowledge-base/how-to-use-the-email-spam-analyzer-an-essential-tool-for-every-e-commerce-store/" rel="nofollow ugc">Learn More</a>.</li>
</ul>
<h3>Features of the plugin Check & Log Email</h3>
<ul>
<li>Test email sending – if you’re not sure whether WordPress is sending emails, you can use this plugin to find out. The process is very simple: you need to choose an address that will receive a simple test email. You can even override the custom header with your own values, to avoid any other issues.</li>
<li>Viewing logged emails – they can be viewed from the admin interface, as they are stored in a separate table. You get the option to filter them based on subject, email, date, etc.</li>
<li>Deleting logged emails – you can delete them by going to the admin interface. You can either delete them in bulk or selectively – by date, email, or subject. </li>
<li>Ability to change the “mail from” email address, “mail from name” and override default email WordPress addresses.</li>
</ul>
<h3>Premium Features of the plugin Check & Log Email</h3>
<ul>
<li>Triggered Data – Triggered data helps you in debugging by showing the exact code that is sending that email <a href="https://check-email.tech/docs/knowledge-base/how-to-use-the-trigger-option-to-debug-emails-by-identifying-the-exact-code/" rel="nofollow ugc">Learn More</a></li>
</ul>
<h3>Filters</h3>
<ul>
<li>
wp_mail_catcher_mail_success – is triggered before an email is sent. It has a single argument that is an array containing original mail info.
</li>
<li>
check_email_email_log_before_insert – is triggered before an email data about to save in check & Log Email. It has a two argument.
<ul>
<li>log – It is an array containing argument that will store in database</li>
<li>original_mail_info – It is an array containing argument of original mail info.</li>
</ul>
</li>
<li>
wp_check_email_failed – is triggered when an email is failed. It has a two argument.
<ul>
<li>mail_error_data – It is an array containing argument that has what possible reasons of error.</li>
<li>mail_error_message – It is an string containing error message.</li>
</ul>
</li>
</ul>
<h3>Action</h3>
<ul>
<li>
check_email_log_inserted – is triggered after data successfully saved in log.
</li>
<li>
check_email_loaded – is triggered when check & log email successfully loaded.
</li>
</ul>
Support 
We try our best to provide support on WordPress.org forums. However, We have a special <a href="https://check-email.tech/contact/" rel="nofollow ugc">community support</a> where you can ask us questions and get help about your Check & Log Email related questions. Delivering a good user experience means a lot to us and so we try our best to reply each and every question that gets asked.
Bug Reports 
Bug reports for Check & Log Email are <a href="https://github.com/ahmedkaludi/check-email" rel="nofollow ugc">welcomed on GitHub</a>. Please note GitHub is not a support forum, and issues that aren’t properly qualified as bugs will be closed.
Credits 
* jsPDF used https://github.com/parallax/jsPDF – License URI: https://github.com/parallax/jsPDF/blob/master/LICENSE 
* league/oauth2-client used https://github.com/thephpleague/oauth2-client – License URI: https://github.com/thephpleague/oauth2-client/blob/master/LICENSE

Check & Log Email – Easy Email Testing & Mail logging


Great job, helped keep communications flowing.


Satisfied, works as expected.


Super helpful plugin that helps me debug my WordPress email sending, without the paywall.


Works exactly as intended.


This is my go to plugin when I need to check and log the email system. Keep up the good work.Warmly,Razvan


My go to plugin


It is a very good plugin and always help you to log and see the emails being sent from the server. You can see if there is any failing email or not.


Great Plugin and works well

Check & Log email allows you to test if your website is correctly sending emails . Overriding of email headers and carbon copying to another address.

Super Duper SMTP Mail Bridge vs Check & Log Email – Easy Email Testing & Mail logging