- Add workaround for DBMail's bug http://www.dbmail.org/mantis/view.php?id=881 (#1487766)

CHANGELOG

@@ -1,6 +1,7 @@
 CHANGELOG Roundcube Webmail
 ===========================
 
+- Add workaround for DBMail's bug http://www.dbmail.org/mantis/view.php?id=881 (#1487766)
 - Use IMAP's ID extension (RFC2971) to print more info into debug log
 - Security: add optional referer check to prevent CSRF in GET requests
 - Fix email_dns_check setting not used for identities/contacts (#1487740)

program/include/rcube_imap_generic.php

@@ -3313,10 +3313,11 @@ class rcube_imap_generic
         else if ($string === '') {
             return '""';
         }
+        // need quoted-string? find special chars: SP, CTL, (, ), {, %, *, ", \, ]
+        // plus [ character as a workaround for DBMail's bug (#1487766)
         else if ($force_quotes ||
-            preg_match('/([\x00-\x20\x28-\x29\x7B\x25\x2A\x22\x5C\x5D\x7F]+)/', $string)
+            preg_match('/([\x00-\x20\x28-\x29\x7B\x25\x2A\x22\x5B\x5C\x5D\x7F]+)/', $string)
         ) {
-            // string: special chars: SP, CTL, (, ), {, %, *, ", \, ]
             return '"' . strtr($string, array('"'=>'\\"', '\\' => '\\\\')) . '"';
         }