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.

YayCommerce

YaySMTP fixes your WordPress email deliverability and gives you something most free SMTP plugins make you pay for: full email tracking, reporting, and log management, 100% free. 💎
Connect your favorite mailer in 3 steps, then actually see what happens to every email: who opened it, who clicked, how your sending trends over time, and what failed.
Every feature below is free. YaySMTP Pro adds only priority support and feature-request access, never a feature paywall.
<h3>Why YaySMTP over other free SMTP plugins?</h3>
Other free SMTP plugins get your mail delivered. YaySMTP gets it delivered and shows you what happened & what’s next:
📊 Email open & click tracking 
Know which transactional and marketing emails actually get read.
📈 Email Reports with charts & statistics 
Visualize your sending over time: delivery volume, opens, and clicks in clear charts, so you can spot trends and catch problems early. No paid analytics add-on required.
📁 Export email logs to CSV 
Keep auditable backups of everything you’ve sent. Filter, search, show/hide columns.
♻️ Import email logs from your old plugin 
Switching from <a href="https://wordpress.org/plugins/wp-mail-smtp/" rel="ugc">WP Mail SMTP</a>, Easy WP SMTP, and others brings your email history with you, not just your settings.
🛒 WooCommerce email preview & test 
Preview and send real WooCommerce order emails before customers see them.
🗓️ Configurable log retention 
Keep logs forever or 7 to 365 days, plus weekly/monthly summary reports, totally free.
<h3>⚡️ Core Features</h3>
<ul>
<li>Email Reports & analytics: Track email performance over time with built-in charts and statistics, including sent volume, open rates, and click activity at a glance.</li>
<li>Full email log: Keep all email logs with content and metadata. Filter, show/hide columns, and search by subject, recipient, and more.</li>
<li>Open & click tracking: See which emails are opened and which links are clicked.</li>
<li>Export/Import email logs: Save sent emails as CSV; import logs from your previous SMTP plugin. 
Configurable log retention: Keep logs forever or auto-retain within the latest 7 to 365 days.</li>
<li>Weekly/monthly summary reports: Get email performance digests delivered to your inbox.</li>
<li>WooCommerce optimized: Send and preview real WooCommerce transactional emails; works perfectly with <a href="https://wordpress.org/plugins/yaymail/" rel="ugc">YayMail</a>.</li>
<li>Fallback mailer, send test email, disable email delivery (dev mode), one-click migration, clean UI/UX.</li>
</ul>
<h3>💪 Supported Mailer</h3>
YaySMTP supports mailers many other plugins skip, including MailJet, SMTP.com, SendPulse, Mandrill (Mailchimp), Yournotify, and IONOS, alongside Amazon SES, SendGrid, Gmail, Outlook/Office 365, Mailgun, Brevo, Zoho, Postmark, and any custom SMTP.
<ol>
<li>SendGrid </li>
<li>Gmail SMTP server</li>
<li>Zoho</li>
<li>Brevo (formerly Sendinblue SMTP)</li>
<li>Mailgun</li>
<li>SMTP.com </li>
<li>Amazon SES</li>
<li>Postmark</li>
<li>MailJet</li>
<li>MessageBird (formely Sparkpost)</li>
<li>Pepipost</li>
<li>SendPulse</li>
<li>Microsoft Outlook, Office 365, Microsoft Exchange Online</li>
<li>Mandrill SMTP by Mailchimp</li>
<li>Yournotify</li>
<li>IONOS</li>
<li>Your hosting’s email server</li>
<li>And more! <a href="https://yaycommerce.com/contact/" rel="nofollow ugc">Contact us</a> to suggest your favorite mailer</li>
</ol>
<h3>🎯 Why use YaySMTP?</h3>
Customers who buy products from your website expect regular updates and follow-ups. That’s why timely communication is crucial to your business.
Sending follow-up WordPress emails on time can bring customers back while building trust and brand value.
<h3>📝 Documentation and Support</h3>
If you’re having issues, do let us know, and we’ll be <a href="https://yaycommerce.com/support/" rel="nofollow ugc">happy to help</a>.
<h3>♥️ Like this YaySMTP Plugin?</h3>
👉 Rate us 5 stars on <a href="https://wordpress.org/support/plugin/yaysmtp/reviews/#new-post" rel="ugc">WordPress.org</a>.
✅ Check out our best-selling WordPress plugins:
<ul>
<li><a href="https://yaycommerce.com/yaymail-woocommerce-email-customizer/" rel="nofollow ugc">YayMail – WooCommerce Email Customizer</a></li>
<li><a href="https://yaycommerce.com/yaymail-addons/" rel="nofollow ugc">Email Customizer Addons</a></li>
<li><a href="https://yaycommerce.com/yaycurrency-woocommerce-multi-currency-switcher/" rel="nofollow ugc">YayCurrency – WooCommerce Multi-Currency Switcher</a></li>
<li><a href="https://yaycommerce.com/yaypricing-woocommerce-dynamic-pricing-and-discounts/" rel="nofollow ugc">YayPricing – WooCommerce Dynamic Pricing And Discounts</a></li>
<li><a href="https://yaycommerce.com/yayextra-woocommerce-extra-product-options/" rel="nofollow ugc">YayExtra – WooCommerce Extra Product Options</a></li>
<li><a href="https://yaycommerce.com/yayswatches-variation-swatches-for-woocommerce/" rel="nofollow ugc">YaySwatches – Variation Swatches for WooCommerce</a></li>
</ul>
✅ Plugins to boost conversions and increase AOV in WooCommerce:
<ul>
<li><a href="https://yaycommerce.com/yayreviews-advanced-customer-reviews-for-woocommerce/" rel="nofollow ugc">YayReviews – Advanced Customer Reviews with AI Summary</a> ✨</li>
<li><a href="https://yaycommerce.com/yayboost-sales-booster-for-woocommerce/" rel="nofollow ugc">YayBoost – Sales Booster for WooCommerce</a></li>
<li><a href="https://yaycommerce.com/yay-wholesale-b2b-for-woocommerce/" rel="nofollow ugc">Yay Wholesale B2B</a></li>
</ul>

YaySMTP – WP Mail SMTP with Email Logs, Tracking & Reports

I just wanted to come and say thank you for this amazing plugin. This is basically the only plugin that works for multisite global configuration. 

I lost 45 minutes trying different plugins for my multisite network, basically i tried all those plugins with millions of installs and none of them do what this plugin does.

Great job!

Excellent! Great job.


This is the ultimate SMTP plugin. It even has email logs, which is a must-have. It's incredibly easy to use, and the developers are available right away! It's truly excellent.


The best SMTP i've tried


Happy to finally find this plugin. Simple to setup and Microsoft 365 is free on this one ! :)



Thanks you the team for this amazing plugin ;-)


Best SMTP plugin

Free WordPress SMTP plugin with email logs, open & click tracking, reports & charts, CSV export, and WooCommerce email preview.

Super Duper SMTP Mail Bridge vs YaySMTP – WP Mail SMTP with Email Logs, Tracking & Reports