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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.

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2  
You have a very low accept rate - you might find that your questions are answered more quickly if you take a moment to go back and accept answers, or comment on why they're not good, – anu Apr 21 '11 at 10:32
    
You deleted your answer and changed the question, that's a little abrupt don't you think ? I'm not looking specifically for a non-plugin solution.. I don't get it man.. you're after the points or sth ? – mike23 Apr 21 '11 at 11:34
    
You want a non-plugin solution, I don't see what's contentious about that. I don't know what sth means. – anu Apr 21 '11 at 12:00
    
I cannot beleive we're doing this. Can you please repost your answer? I'll give you the green tick I promise. – mike23 Apr 21 '11 at 12:32
up vote 43 down vote accepted

the new user email is sent using wp_new_user_notification() function which is pluggable meaning 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);

    }
}
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@Bainternet I cannot seem to get this to work, I have added this to my functions file, but the standard email keeps sending. I'm on multisite, but that shouldn't matter, right? – Piet Jul 2 '11 at 2:33
5  
OK got it now, it only seems to work as a separate plugin, not when you add it to your functions.php file. Now it works perfect, thanks again for that nice piece of code! – Piet Jul 2 '11 at 3:03
    
Does it works for multisite too? I can see multisite has bunch of functions inside ms-functions.php for sending notification email. – Sisir Jul 28 '13 at 7:42
    
Multisite uses wpmu_signup_user_notification I think. – Wyck Nov 25 '14 at 21:43
    
This answer is several years old. The accepted answer doesn't work for me. (Adding it to functions.php has makes no difference to any of the emails sent when a new user registers.) Should I post a new question? – oldmankit Apr 21 '15 at 11:23

This will don't work on functions.php, you need to put this code inside plugin.

if you don't now to make a plugin for this just use this link

don't forget to take the update code of this function form here

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protected by toscho Oct 11 '12 at 1:46

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