BuddyPress.org

Yep. Though be sure to add the php tags in the file. So:

<?php
function custom_wp_mail_from( $email ) {
        $handle = 'laurentdesserrey';
	$find = 'http://'; 
	$replace = '';
	$link = get_bloginfo( 'url' );
	$domain = str_replace( $find, $replace, $link );
	return $handle . '@' . $domain ;
}
add_filter( 'wp_mail_from', 'custom_wp_mail_from' );
?>

Paste that into a file and you’ll be good to go.