Register a user from email.

Hello,

We are trying to create a new registered user from the postie sender email address but without success.
Can somebody have a look at this code and make any suggestions ?

<?php
function my_postie_post_function($post) {
    //do something here like update $post['post_content']

add_filter('postie_filter_email', 'my_filterEmail');

function my_filterEmail($email) {
    //create the user

function my_postie_post_function($post) {
    //do something here like update $post['post_content']

add_filter('postie_filter_email', 'my_filterEmail');

function my_filterEmail($email) {
    //create the user

$user_id = username_exists( $user_name );
if ( !$user_id and email_exists($user_email) == false ) {
    $random_password = wp_generate_password( $length=12, $include_standard_special_chars=false );
    $user_id = wp_create_user( $user_name, $random_password, $user_email );
} else {
    $random_password = __('User already exists.  Password inherited.');
}

    return $email;
}

    return $post;
}

add_filter('postie_post_before', 'my_postie_post_function');

}

    return $post;
}

add_filter('postie_post_before', 'my_postie_post_function');

?>

Thanks

https://wordpress.org/plugins/postie/