Title: Resonanz Email Rerouting Author: Resonanz Digital Published: August 26, 2026 Last modified: August 26, 2026 --- Search plugins ![](https://s.w.org/plugins/geopattern-icon/resonanz-email-rerouting.svg) # Resonanz Email Rerouting By [Resonanz Digital](https://profiles.wordpress.org/resonanzdigital/) [Download](https://downloads.wordpress.org/plugin/resonanz-email-rerouting.1.5.0.zip) * [Details](https://wordpress.org/plugins/resonanz-email-rerouting/#description) * [Reviews](https://wordpress.org/plugins/resonanz-email-rerouting/#reviews) * [Installation](https://wordpress.org/plugins/resonanz-email-rerouting/#installation) * [Development](https://wordpress.org/plugins/resonanz-email-rerouting/#developers) [Support](https://wordpress.org/support/plugin/resonanz-email-rerouting/) ## Description Resonanz Email Rerouting makes testing websites safer by rerouting outgoing emails to a specific address based on the current environment (local, development, staging, production), as defined by the `WP_ENVIRONMENT_TYPE` constant in your `wp-config. php` file. #### Features * Reroute emails based on `WP_ENVIRONMENT_TYPE`. * Enable or disable email rerouting on a per-environment basis. * Add domains to a whitelist to avoid rerouting mail sent to those domains. * Add one or more email addresses to which emails should be rerouted. * Grant different user roles access to the plugin settings. * Add a prefix to the subject line of rerouted emails. * Append a message to the body of rerouted emails. * Display a notification to the logged-in user when an email has been rerouted. * Enable or disable simple email logging, including a retention policy. * Easily export and import settings in JSON format. * Works with Gravity Forms and Contact Form 7. ## Installation 1. Configure the environment variable in `wp-config.php` (see FAQ below). 2. Upload the entire `resonanz-email-rerouting` folder to the `/wp-content/plugins/` directory. 3. Activate the plugin through the ‘Plugins’ menu in WordPress. ## FAQ ### How do I set the environment variable? You can set the environment variable in your `wp-config.php` file. Add a line like the following: ``` define('WP_ENVIRONMENT_TYPE', 'local'); ``` For further information, see the WordPress documentation: https://developer.wordpress. org/apis/wp-config-php/#wp-environment-type ### Does this plugin work with other email related plugins? We cannot guarantee that this plugin will function as expected if you use other email-related plugins. If you have a plugin that makes use of SMTP, you should probably disable it for this plugin to work correctly. If you encounter specific issues, please let us know. ### Where can I find further help? If you require assistance, feel free to email us at wordpress@resonanz-digital.at. ## Reviews There are no reviews for this plugin. ## Contributors & Developers “Resonanz Email Rerouting” is open source software. The following people have contributed to this plugin. Contributors * [ Resonanz Digital ](https://profiles.wordpress.org/resonanzdigital/) [Translate “Resonanz Email Rerouting” into your language.](https://translate.wordpress.org/projects/wp-plugins/resonanz-email-rerouting) ### Interested in development? [Browse the code](https://plugins.trac.wordpress.org/browser/resonanz-email-rerouting/), check out the [SVN repository](https://plugins.svn.wordpress.org/resonanz-email-rerouting/), or subscribe to the [development log](https://plugins.trac.wordpress.org/log/resonanz-email-rerouting/) by [RSS](https://plugins.trac.wordpress.org/log/resonanz-email-rerouting/?limit=100&mode=stop_on_copy&format=rss). ## Changelog #### 1.5.0 * Hardened sanitization of saved settings: role permission keys are now validated against the roles WordPress actually offers. * Settings import now runs through the same sanitizer as the settings form, so imported files can no longer store unsanitized values. * Prefixed the AJAX, admin-post and log-purge action names to avoid collisions with other plugins. * Prefixed the email log meta keys. Existing logs are migrated automatically on upgrade. * Added nonce verification to both AJAX endpoints. * Fixed settings import rejecting every file. The uploaded file is now identified correctly. * Fixed settings import failing on Windows servers because the upload path was altered before use. * Renamed an internal helper that shadowed WordPress core’s `sanitize_email()`. * Updated “Tested up to” for WordPress 7.1. #### 1.4.0 * Hardened input handling and output escaping throughout the plugin (Plugin Check compliance). * Fixed per-environment settings (whitelisted domains and reroute addresses) not being sanitized on save. * Fixed role capabilities lagging one save behind when permissions were changed. * Fixed the bundled German translation not loading (translation files renamed to match the text domain). * Added cleanup on deactivation (scheduled event) and uninstall (options, capability, and logged data). * Switched to safe redirects and `gmdate()`, and added a `readme.txt`. #### 1.3.1 * Fixed rerouted emails crashing when `wp_mail()` recipient, sender, subject, or message values were passed in non-string formats. #### 1.3.0 * Validation of entered email addresses in the WordPress backend. * Performance optimizations. #### 1.2.5 * Fixed a minor namespace issue that was causing an error when purging logs. #### 1.2.4 * Make sure post slug is not empty. * Some other minor code improvements. #### 1.2.3 * Added information to allow the plugin to be updated via Git Updater. #### 1.2.2 * First public release of the plugin. ## Meta * Version **1.5.0** * Last updated **3 days ago** * Active installations **Fewer than 10** * WordPress version ** 6.0 or higher ** * Tested up to **7.1** * PHP version ** 8.0 or higher ** * Tags * [development](https://wordpress.org/plugins/tags/development/)[email](https://wordpress.org/plugins/tags/email/) [rerouting](https://wordpress.org/plugins/tags/rerouting/)[staging](https://wordpress.org/plugins/tags/staging/) [testing](https://wordpress.org/plugins/tags/testing/) * [Advanced View](https://wordpress.org/plugins/resonanz-email-rerouting/advanced/) ## Ratings No reviews have been submitted yet. [Your review](https://wordpress.org/support/plugin/resonanz-email-rerouting/reviews/#new-post) [See all reviews](https://wordpress.org/support/plugin/resonanz-email-rerouting/reviews/) ## Contributors * [ Resonanz Digital ](https://profiles.wordpress.org/resonanzdigital/) ## Support Got something to say? Need help? [View support forum](https://wordpress.org/support/plugin/resonanz-email-rerouting/)