program/include/rcmail.php
@@ -699,12 +699,12 @@ // Here we need IDNA ASCII // Only rcube_contacts class is using domain names in Unicode $host = idn_to_ascii($host); $host = rcube_idn_to_ascii($host); if (strpos($username, '@')) { // lowercase domain name list($local, $domain) = explode('@', $username); $username = $local . '@' . mb_strtolower($domain); $username = idn_to_ascii($username); $username = rcube_idn_to_ascii($username); } // user already registered -> overwrite username