======Lua SMTP MX Server Rules======

Every time VPOP3 checks for remote MX server for sending messages using direct MX sending, it runs a script called **mxserverrules.lua** which can be created/edited in Settings -> Scripts (or in the VPOP3 directory in VPOP3 v6.6 or earlier).

=====GetCheckCache=====
''GetCheckCache("<Domain>", numRetries, messageSize)''

returns true if VPOP3's DNS cache should be used, or false to do a fresh DNS lookup

=====GetOverrides=====
''GetOverrides("<Domain>", numRetries, messageSize)''

returns **DNS Server Map**, **continue**

If **continue** is false, then VPOP3 will act as if there were no MX/A records defined for this destination

=====CheckServer=====
(VPOP3 7.10 and later)

''CheckServer("<Domain>", "<MX Server>", numRetries, messageSize, defaultResult)''

returns true if the MX server is OK to use, false if it should be ignored

=====FinalOverrides=====
(VPOP3 8.6 and later)