roundcubemail/program/lib/Roundcube/rcube.php
public function gen_message_id($sender = null)
    {
        $local_part  = md5(uniqid('rcube'.mt_rand(), true));
        $domain_part = '';

        if ($sender && preg_match('/@([^\s]+\.[a-z0-9-]+)/', $sender, $m)) {
            $domain_part = $m[1];
        }
        else {
            $domain_part = $this->user->get_username('domain');
        }

        // Try to find FQDN, some spamfilters doesn't like 'localhost' (#1486924)
        if (!preg_match('/\.[a-z0-9-]+$/i', $domain_part)) {
            foreach (array($_SERVER['HTTP_HOST'], $_SERVER['SERVER_NAME']) as $host) {
                $host = preg_replace('/:[0-9]+$/', '', $host);
                if ($host && preg_match('/\.[a-z]+$/i', $host)) {
                    $domain_part = $host;
                    break;
                }
            }
        }

        return sprintf('<%s@%s>', $local_part, $domain_part);
    }
public function gen_message_id($sender = null)
    {
        $local_part  = md5(uniqid('rcube'.mt_rand(), true));
        $domain_part = '';

        if ($sender && preg_match('/@([^\s]+\.[a-z0-9-]+)/', $sender, $m)) {
            $domain_part = $m[1];
        }
        else {
            $domain_part = $this->user->get_username('domain');
        }

        // Try to find FQDN, some spamfilters doesn't like 'localhost' (#1486924)
        if (!preg_match('/\.[a-z0-9-]+$/i', $domain_part)) {
            foreach (array($_SERVER['HTTP_HOST'], $_SERVER['SERVER_NAME']) as $host) {
                $host = preg_replace('/:[0-9]+$/', '', $host);
                if ($host && preg_match('/\.[a-z]+$/i', $host)) {
                    $domain_part = $host;
                    break;
                }
            }
        }

        return sprintf('<%s@%s>', $local_part, $domain_part);
    }
public function gen_message_id ( $ sender = null ) { $ local_part = md5 ( uniqid ( 'rcube' . mt_rand ( ) , true ) ) ; $ domain_part = '' ; if ( $ sender && preg_match ( '/@([^\s]+\.[a-z0-9-]+)/' , $ sender , $ m ) ) { $ domain_part = $ m [ 1 ] ; } else { $ domain_part = $ this -> user -> get_username ( 'domain' ) ; } // Try to find FQDN, some spamfilters doesn't like 'localhost' (#1486924) if ( ! preg_match ( '/\.[a-z0-9-]+$/i' , $ domain_part ) ) { foreach ( array ( $ _SERVER [ 'HTTP_HOST' ] , $ _SERVER [ 'SERVER_NAME' ] ) as $ host ) { $ host = preg_replace ( '/:[0-9]+$/' , '' , $ host ) ; if ( $ host && preg_match ( '/\.[a-z]+$/i' , $ host ) ) { $ domain_part = $ host ; break ; } } } return sprintf ( '<%s@%s>' , $ local_part , $ domain_part ) ; }
Unique Message-ID generator.

@param string $sender Optional sender e-mail address

@return string Message-ID
Unique Message - ID generator .