How to change the default registration email ? (plugin and/or non-plugin)

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After a new user registration, WP sends out an email with the login / password, and a link to the login page.

Is there a way to change this defaut email template? I’d also like to change the subject and sender.

Edit : For anyone interested, here is a plugin solution.

3

The new user email is sent using the wp_new_user_notification() function. This function is pluggable, which means that you can overwrite it:

// Redefine user notification function
if ( !function_exists('wp_new_user_notification') ) {
    function wp_new_user_notification( $user_id, $plaintext_pass="" ) {
        $user = new WP_User($user_id);

        $user_login = stripslashes($user->user_login);
        $user_email = stripslashes($user->user_email);

        $message  = sprintf(__('New user registration on your blog %s:'), get_option('blogname')) . "\r\n\r\n";
        $message .= sprintf(__('Username: %s'), $user_login) . "\r\n\r\n";
        $message .= sprintf(__('E-mail: %s'), $user_email) . "\r\n";

        @wp_mail(get_option('admin_email'), sprintf(__('[%s] New User Registration'), get_option('blogname')), $message);

        if ( empty($plaintext_pass) )
            return;

        $message  = __('Hi there,') . "\r\n\r\n";
        $message .= sprintf(__("Welcome to %s! Here's how to log in:"), get_option('blogname')) . "\r\n\r\n";
        $message .= wp_login_url() . "\r\n";
        $message .= sprintf(__('Username: %s'), $user_login) . "\r\n";
        $message .= sprintf(__('Password: %s'), $plaintext_pass) . "\r\n\r\n";
        $message .= sprintf(__('If you have any problems, please contact me at %s.'), get_option('admin_email')) . "\r\n\r\n";
        $message .= __('Adios!');

        wp_mail($user_email, sprintf(__('[%s] Your username and password'), get_option('blogname')), $message);

    }
}

Note: Overriding pluggable functions cannot be done in the theme functions.php file. WP’s pluggable file is already loaded by that point so the function would be defined by WP (i.e. the default). Your custom version must load before this happens, which means you must load it in a custom plugin file.

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