WP Email Debugger

WP Email Debugger helps you troubleshoot WordPress email delivery issues by sending test emails with full debug logs. Logs include headers, sendmail path, and result. Logs are displayed in the admin and emailed to the site administrator.

Features

• Send test emails from WordPress with To, CC, BCC fields.
• Optional HTML email content.
• Logs email headers, sendmail path, and send result via error_log().
• Displays the debug log in WordPress admin.
• Emails a debug log to the admin email for review.
• Ideal for diagnosing PHP mail() or SMTP delivery issues.

Installation

1. Upload the wp-email-debugger folder to the /wp-content/plugins/ directory.
2. Activate the plugin through the Plugins menu in WordPress.
3. Go to Email Debugger in the admin menu.
4. Fill out the To, CC, BCC, Subject, and Message fields.
5. Check Send as HTML if needed.
6. Click Send Test Email to send and receive the debug log.

✉️ Core Features

• Email format validation (checks if an email is syntactically correct)
• Domain validation (checks if the domain exists)
• MX record checking (ensures the domain can receive emails)
• SMTP verification (tests if the mailbox actually accepts mail)
• Disposable email detection (blocks temporary email services)
• Free vs business email detection

⚙️ New in the Release

• Performance improvements (faster validation or batch processing)
• Better error handling and reporting
• API improvements (simpler usage, better typing, etc.)
• New utilities or helper functions
• Bug fixes and stability improvements

🚀 Use Cases

• Signup form validation
• Preventing fake or spam accounts
• Email marketing list cleaning
• Improving email deliverability
• Backend validation for apps and SaaS products

📦 Technical Improvements (typical)

• Optimized builds (bundling, smaller package size)
• TypeScript support or improved typings
• Better test coverage
• Caching and concurrency improvements
• Updated dependencies

Frequently Asked Questions

Q: Can I use this with SMTP plugins?
A: Yes. WP Email Debugger works with the default wp_mail(). If you have an SMTP plugin, it respects its configuration.

Q: Will the plugin actually send emails?
A: Yes. It sends real emails to the recipients and also emails a copy of the debug log to the WordPress admin.

Q: Does it store emails anywhere?
A: No. It only logs the attempt temporarily and emails the debug log to the admin. No database storage.

Changelog

1.1

• Added email logging and sending debug log to admin.
• Supports To, CC, BCC and HTML preview.
• Uses error_log() for full debugging.

1.0

• Initial release with basic test email form.