SendGrid URL Handling WordPress

### Method 1: Customizing the Password Reset Email

1. **Use a Custom Email Template**: Create a custom email template for password reset notifications.

2. **Hook into the Password Reset Process**: Use the `retrieve_password` action hook to modify the password reset email before it's sent. You can filter the email content and ensure the original URL remains intact.

3. **Add the Following Code to Your Theme's `functions.php` File**:

add_filter('retrieve_password_message', 'custom_retrieve_password_message', 10, 4);
   function custom_retrieve_password_message($message, $key, $user_login, $user) {
       // Get the original reset link
       $reset_link = site_url("wp-login.php?action=rp&key={$key}&login=" . rawurlencode($user_login), 'login');

       // Create the custom message
       $message = sprintf(__('Hello, %s'), $user->display_name) . "rnrn";
       $message .= __('You requested a password reset. Click the link below to reset your password:') . "rnrn";
       $message .= $reset_link . "rnrn"; // Use the original URL
       $message .= __('If you did not request this, please ignore this email.') . "rn";
       
       return $message;
   }

### Method 2: Using a SendGrid Template

If you're using SendGrid's dynamic templates, you can set up a custom template for password reset emails that includes the original URL. This would prevent SendGrid from altering the links while still allowing you to utilize click tracking.

1. **Create a Dynamic Template**: Go to your SendGrid dashboard and create a new dynamic email template for password resets.

2. **Use Merge Fields**: In your email template, include a merge field for the password reset link. SendGrid will not replace this link if it's included in the template directly.

3. **Modify the Email Sending Logic**: In your WordPress code where you send the password reset email, call SendGrid with your dynamic template and pass the original reset link as a merge variable.

### Considerations

– **Testing**: After making these changes, test the password reset process to ensure that the original URL is being sent correctly and that the email format meets your requirements.
– **Security**: Ensure that the URL you provide for password reset is secure and not easily guessable.

This approach allows you to maintain your click tracking while ensuring that users receive the original reset link in the email.

### Step-by-Step Implementation

1. **Open your theme's `functions.php` file**: You can find this file in your active theme directory, typically located at `wp-content/themes/your-active-theme/functions.php`.

2. **Add the Filter for Password Reset Message**: Insert the following code snippet into your `functions.php` file. This code hooks into the password reset email process, allowing you to customize the message without altering the reset URL.

add_filter('retrieve_password_message', 'custom_retrieve_password_message', 10, 4);
function custom_retrieve_password_message($message, $key, $user_login, $user) {
    // Get the original reset link
    $reset_link = site_url("wp-login.php?action=rp&key={$key}&login=" . rawurlencode($user_login), 'login');

    // Create the custom message
    $message = sprintf(__('Hello, %s'), $user->display_name) . "rnrn";
    $message .= __('You requested a password reset. Click the link below to reset your password:') . "rnrn";
    $message .= $reset_link . "rnrn"; // Use the original URL
    $message .= __('If you did not request this, please ignore this email.') . "rn";
    
    return $message;
}

### Explanation of the Code

– **Hook into `retrieve_password_message`**: This filter allows you to modify the content of the password reset email before it's sent.

– **Parameters**:
– `$message`: The original message that WordPress generates for the password reset email.
– `$key`: The unique key for the password reset.
– `$user_login`: The username of the user requesting the password reset.
– `$user`: The user object.

– **Generate the Reset Link**: The `$reset_link` variable constructs the actual password reset URL using `site_url()`. This ensures that the original URL remains intact.

– **Customize the Email Content**: You can modify the message as needed. The example provided includes a greeting, instructions, the reset link, and a note for users who did not request the reset.

### Testing

1. **Trigger a Password Reset**: After adding the code, trigger the password reset process by going to the login page and clicking on "Lost your password?" Enter a valid username or email address.

2. **Check the Email**: After submitting the form, check the email you receive. Ensure that the password reset link is correct and that the email content is formatted as expected.

### Additional Considerations

– **Backup**: Always back up your `functions.php` file or use a child theme to avoid losing changes during theme updates.

– **Custom Styling**: If you want to apply any custom styling to the email content, consider using SendGrid’s dynamic templates instead of modifying the plain text message.

This solution effectively prevents SendGrid from altering the password reset URL while keeping the email informative and user-friendly.