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Super Duper SMTP Mail Bridge<\/strong> replaces the unreliable WordPress PHP mail function with a properly authenticated SMTP connection. Emails reach inboxes instead of spam folders or the void.<\/p>\n\n \ud83c\udde9\ud83c\uddea\ud83c\udde6\ud83c\uddf9\ud83c\udde8\ud83c\udded Hinweis f\u00fcr DACH-Nutzer: Plugin und Support sind auf Deutsch (Schweiz\/Deutschland\/\u00d6sterreich) verf\u00fcgbar. Alle Texte und Einstellungen sind vollst\u00e4ndig auf Deutsch \u00fcbersetzt.<\/p>\n\n Unlike other SMTP plugins, this one gives you everything for free<\/strong> \u2013 no feature gates, no \"upgrade to Pro\" nags, no premium tiers. Every feature listed below works right out of the box.<\/p>\n\n 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:<\/p>\n\n \ud83d\udee1\ufe0f Backup SMTP with Automatic Failover<\/strong> \u2014 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.<\/p>\n\n \u23f1\ufe0f Built-in Rate Limiting<\/strong> \u2014 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.<\/p>\n\n \ud83c\udf10 Domain Control (Whitelist & Blacklist)<\/strong> \u2014 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.<\/p>\n\n \ud83d\udd10 AES-256-CBC Password Encryption<\/strong> \u2014 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.<\/p>\n\n \ud83d\udccb Full Email Log with HTML Preview<\/strong> \u2014 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.<\/p>\n\n \ud83d\udd27 SMTP Debug Transcript<\/strong> \u2014 Enable debug mode and get the complete SMTP server conversation logged for each email. Essential for troubleshooting \u2013 most plugins don't offer this at all, or charge for it.<\/p>\n\n \u26a0\ufe0f Smart Admin Notifications<\/strong> \u2014 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.<\/p>\n\n \ud83d\udc41\ufe0f BCC Monitoring & GDPR\/DSGVO Compliance<\/strong> \u2014 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 \u2013 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.<\/p>\n\n \ud83d\udeab Zero Bloat<\/strong> \u2014 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.<\/p>\n\n Any standard SMTP server works: Gmail, Outlook\/Office 365, Mailgun, SendGrid, Amazon SES, Postmark, your own mail server, your hosting provider's SMTP \u2013 if it speaks SMTP, this plugin connects to it.<\/p><\/dd>\n Yes. SMTP passwords are encrypted with AES-256-CBC (using OpenSSL) before storage. The encryption key is derived from your WordPress AUTH_KEY salt. Most other SMTP plugins store passwords in plain text or simple base64 encoding.<\/p><\/dd>\n If you have configured a backup SMTP server, the plugin automatically retries the email through the backup. Both the primary failure and the backup attempt are logged separately, so you have full visibility.<\/p><\/dd>\n Rate limiting caps the number of emails your site can send per minute, hour, or day. This protects you if a contact form gets spammed, a plugin sends mass notifications, or your site is compromised. Emails exceeding the limit are blocked and logged.<\/p><\/dd>\n All plugin data is completely removed: options, transients, and the custom log database table. No traces left behind.<\/p><\/dd>\n Yes. All WooCommerce transactional emails (order confirmations, shipping notifications, password resets) are sent through your configured SMTP server.<\/p><\/dd>\n Rate limiting, domain whitelisting\/blacklisting, BCC monitoring with GDPR compliance, sender domain validation, and AES-256 password encryption are features no other free SMTP plugin offers. If you want maximum control over your email delivery without paying for a Pro license, this is your plugin.<\/p><\/dd>\n Under GDPR, you may need to prove that a specific email (e.g. a consent confirmation, data deletion notice, or privacy policy update) was actually sent to a user. The email log provides a timestamped record with full content, and the BCC copy gives you an independent second proof stored in a separate mailbox. Together, this creates a verifiable audit trail that can hold up in legal disputes \u2013 something no other free SMTP plugin provides out of the box.<\/p><\/dd>\n\n<\/dl>\n\n\nWhy choose this plugin over the big names?<\/h4>\n\n
Complete Feature List<\/h4>\n\n
\n
Feature Comparison<\/h4>\n\n\n\n\n Feature\n Super Duper SMTP\n WP Mail SMTP\n FluentSMTP\n Post SMTP\n\n\n\n\n SMTP Configuration\n \u2705 Free\n \u2705 Free\n \u2705 Free\n \u2705 Free\n\n\n Email Logging\n \u2705 Free\n \ud83d\udcb0 Pro only\n \u2705 Free\n \u2705 Free\n\n\n Email Content in Log\n \u2705 Free\n \ud83d\udcb0 Pro only\n \u2705 Free\n \u2705 Free\n\n\n Backup SMTP Failover\n \u2705 Free\n \ud83d\udcb0 Pro only\n \u2705 Free\n \u2705 Free\n\n\n Rate Limiting\n \u2705 Free\n \u274c Not available\n \u274c Not available\n \u274c Not available\n\n\n Domain Whitelist\n \u2705 Free\n \u274c Not available\n \u274c Not available\n \u274c Not available\n\n\n Domain Blacklist\n \u2705 Free\n \u274c Not available\n \u274c Not available\n \u274c Not available\n\n\n BCC Monitoring (GDPR compliance)\n \u2705 Free\n \u274c Not available\n \u274c Not available\n \u274c Not available\n\n\n Password Encryption\n \u2705 AES-256-CBC\n \u274c Plain\/base64\n \u274c Plain\/base64\n \u274c Plain\/base64\n\n\n SMTP Debug Transcript\n \u2705 Free\n \u274c Not available\n \u274c Not available\n \u2705 Free\n\n\n Admin Error Alerts\n \u2705 Free\n \ud83d\udcb0 Pro only\n \u2705 Free\n \u2705 Free\n\n\n Sender Domain Validation\n \u2705 Free\n \u274c Not available\n \u274c Not available\n \u274c Not available\n\n\n Upsell\/Ads in Admin\n \u274c None\n \u26a0\ufe0f Yes\n \u274c None\n \u26a0\ufe0f Yes\n\n\n
\n
\/wp-content\/plugins\/<\/code><\/li>\n\n
Which SMTP servers are supported?<\/h3><\/dt>\n
Are passwords stored securely?<\/h3><\/dt>\n
What happens when the primary SMTP server fails?<\/h3><\/dt>\n
What is rate limiting and why do I need it?<\/h3><\/dt>\n
What happens when the plugin is uninstalled?<\/h3><\/dt>\n
Does this plugin work with WooCommerce?<\/h3><\/dt>\n
Why should I use this instead of WP Mail SMTP or FluentSMTP?<\/h3><\/dt>\n
How does BCC monitoring help with GDPR\/DSGVO compliance?<\/h3><\/dt>\n
1.2.6 \u2013 11.05.2026<\/h4>\n\n
\n