local user_agent_mozilla = string.format('(%s) & !(%s) & !(%s)', user_agent_mozilla5, user_agent_thunderbird, user_agent_seamonkey)
-- Mozilla based common Message-ID template
local mozilla_msgid_common = 'Message-ID=/^\\s*<[\\dA-F]{8}\\.\\d{1,7}\\@([^>\\.]+\\.)+[^>\\.]+>$/X'
-local mozilla_msgid = 'Message-ID=/^\\s*<(3[3-9A-F]|4[\\dA-F])[\\dA-F]{6}\\.(\\d0){0,3}\\d\\@([^>\\.]+\\.)+[^>\\.]+>$/XS'
+local mozilla_msgid = 'Message-ID=/^\\s*<(3[3-9A-F]|4[\\dA-F]|5[\\dA-F])[\\dA-F]{6}\\.(\\d0){0,3}\\d\\@([^>\\.]+\\.)+[^>\\.]+>$/XS'
-- Summary rule for forged Mozilla Mail Message-ID header
reconf['FORGED_MUA_MOZILLA_MAIL_MSGID'] = string.format('(%s) & (%s) & !(%s) & !(%s)', user_agent_mozilla, mozilla_msgid_common, mozilla_msgid, unusable_msgid)
reconf['FORGED_MUA_MOZILLA_MAIL_MSGID_UNKNOWN'] = string.format('(%s) & !(%s) & !(%s) & !(%s)', user_agent_mozilla, mozilla_msgid_common, mozilla_msgid, unusable_msgid)