mail.mws.ac.th has one IP number , which is the same as for mws.ac.th, but no corresponding reverse pointer. 4h.co.th, rcgen.com, mws.ac.th, s-171.com, csneng.com and at least 65 other hosts point to the same IP. mws.ac.th use this as a mailserver. mws.ac.th is delegated to two nameservers, however both delegated nameservers are missing in the zone and one other nameserver is listed. There are two duplicated IP numbers. Incoming mail for mws.ac.th is handled by one mailserver at mws.ac.th themselves. mail.mws.ac.th is hosted on a server in Thailand.