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Super Duper SMTP Mail Bridge

开发者 rogerruckstuhl
更新时间 2026年5月15日 18:06
PHP版本: 8.1 及以上
WordPress版本: 6.9
版权: GPLv2 or later
版权网址: 版权信息

标签

email mail log smtp email-log

下载

1.2.4 1.2.6

详情介绍:

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. Why choose this plugin over the big names? 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. Complete Feature List Feature Comparison | Feature | Super Duper SMTP | WP Mail SMTP | FluentSMTP | Post SMTP | | --- | --- | --- | --- | --- | | SMTP Configuration | ✅ Free | ✅ Free | ✅ Free | ✅ Free | | Email Logging | ✅ Free | 💰 Pro only | ✅ Free | ✅ Free | | Email Content in Log | ✅ Free | 💰 Pro only | ✅ Free | ✅ Free | | Backup SMTP Failover | ✅ Free | 💰 Pro only | ✅ Free | ✅ Free | | Rate Limiting | ✅ Free | ❌ Not available | ❌ Not available | ❌ Not available | | Domain Whitelist | ✅ Free | ❌ Not available | ❌ Not available | ❌ Not available | | Domain Blacklist | ✅ Free | ❌ Not available | ❌ Not available | ❌ Not available | | BCC Monitoring (GDPR compliance) | ✅ Free | ❌ Not available | ❌ Not available | ❌ Not available | | Password Encryption | ✅ AES-256-CBC | ❌ Plain/base64 | ❌ Plain/base64 | ❌ Plain/base64 | | SMTP Debug Transcript | ✅ Free | ❌ Not available | ❌ Not available | ✅ Free | | Admin Error Alerts | ✅ Free | 💰 Pro only | ✅ Free | ✅ Free | | Sender Domain Validation | ✅ Free | ❌ Not available | ❌ Not available | ❌ Not available | | Upsell/Ads in Admin | ❌ None | ⚠️ Yes | ❌ None | ⚠️ Yes |

安装:

  1. Upload the plugin folder to /wp-content/plugins/
  2. Activate the plugin in the WordPress admin
  3. Go to SMTP Mail Bridge → Settings and configure your SMTP server
  4. Send a test email to verify the configuration

屏幕截图:

  • Sender email settings, backup SMTP server for automatic failover, and rate limiting to protect against spam abuse
  • BCC monitoring – sends a copy of every outgoing email to a dedicated address for GDPR-compliant email logging
  • Full domain control – whitelist and blacklist for recipient domains, allowed sender domain validation
  • Admin error notifications with configurable threshold and complete email logging settings
  • Email log overview with status badges (Success, Failed, Blocked, Failover), search, and filter
  • Detailed email view showing full content, headers, error messages, and SMTP debug transcript

升级注意事项:

1.2.6 First public release with all features included. No premium version – everything is free.

常见问题:

Which SMTP servers are supported?

Any standard SMTP server works: Gmail, Outlook/Office 365, Mailgun, SendGrid, Amazon SES, Postmark, your own mail server, your hosting provider's SMTP – if it speaks SMTP, this plugin connects to it.

Are passwords stored securely?

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.

What happens when the primary SMTP server fails?

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.

What is rate limiting and why do I need it?

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.

What happens when the plugin is uninstalled?

All plugin data is completely removed: options, transients, and the custom log database table. No traces left behind.

Does this plugin work with WooCommerce?

Yes. All WooCommerce transactional emails (order confirmations, shipping notifications, password resets) are sent through your configured SMTP server.

Why should I use this instead of WP Mail SMTP or FluentSMTP?

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.

How does BCC monitoring help with GDPR/DSGVO compliance?

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 – something no other free SMTP plugin provides out of the box.

更新日志:

1.2.6 – 11.05.2026