Configure the "Reply-To" header for WordPress emails with validation and customizable admin settings.
The Reply-To for WP_Mail plugin allows you to easily manage the “Reply-To” header for all emails sent from your WordPress site. With this plugin, you can specify a custom email address that recipients will use when replying to your site’s emails, ensuring that responses go to the correct inbox.
Compatibility
- WordPress: 4.1 – 6.9
- PHP: 5.6 – 8.5
ChangeLog
[2.0.0] – 2026-01-20
Major Release – Context-Based Reply-To Routing
This major release combines multiple enhancements including context-based email routing, security improvements, and Reply-To name support.
Added
- Context-based Reply-To routing – Configure different Reply-To addresses for different types of emails.
- Six email contexts: Default, Authentication & Security, Comments & Moderation, Users & Registration, System & Updates, WooCommerce.
- WooCommerce tab only visible when WooCommerce plugin is active.
- Intelligent context detection using backtrace analysis.
- Modern tabbed user interface using WordPress native nav-tab-wrapper.
- Visual status indicators on each tab (green = active with email, red = inactive or no email).
- Legend explaining status indicators for easy understanding.
- Enable/disable toggle for each context (except Default which is always active).
- Fallback chain: Specific context → Default context → Legacy settings.
- Detailed descriptions and examples for each context in the admin UI.
- Reply-To Name field – Now you can specify a name to display with the Reply-To email address (e.g., “Support Team support@example.com“).
- Name sanitization with header injection prevention.
- Length validation for name field (255 characters maximum).
- Created uninstall.php for proper cleanup of plugin data on uninstallation.
- Implemented logging of configuration changes for security auditing (requires WP_DEBUG_LOG).
- Added DNS validation for email domains with user-friendly warnings.
- Enhanced email validation with additional security checks.
- Added success/error messages for better user feedback.
Changed
- Complete rewrite of settings page with modern tab-based interface.
- Email detection now uses backtrace analysis for accurate context identification.
- Settings structure changed from individual options to array-based configuration (wp_mail_replyto_contexts).
- Improved sanitization and validation for multiple contexts.
- Enhanced logging with context information in debug mode.
- Email header construction now supports both name and email format.
- Updated sanitize callback to use custom function with enhanced validation.
- Improved security documentation and code comments.
Security Enhancements
- Added explicit header injection prevention with defense-in-depth validation.
- Implemented strict RFC 5322 email format validation.
- Enhanced input sanitization with multiple validation layers.
Technical
- New database structure: Single serialized array instead of multiple options (more efficient).
- Backward compatible: Legacy options (v1.0.x) still work during migration period.
- Context detection covers: Password resets, comments, user registration, system updates, WooCommerce emails.
- Clean uninstallation: Removes all options including migration flags.
- Automatic migration from v1.0.x – Your existing settings are preserved in the Default context.
Compatibility
- WordPress: 4.1 – 6.9
- PHP: 5.6 – 8.5
Tests
- PHP Coding Standards: 3.13.4
- WordPress Coding Standards: 3.3.0
- Plugin Check (PCP): 1.4.0
[1.0.3] – 2025-04-08
Changed
- Compatible with WordPress 6.8.
- Improved functions documentation.
Compatibility
- WordPress: 4.1 – 6.9
- PHP: 5.6 – 8.5
Tests
- PHP Coding Standards: 3.12.1
- WordPress Coding Standards: 3.1.0
- Plugin Check (PCP): 1.4.0
[1.0.2] – 2024-11-02
Fixed
- Preparation for GlotPress.
[1.0.1] – 2024-10-31
Added
[1.0.0] – 2024-10-22
Added
