Summary
mail.pup.edu.ph has one IP number , via cname to
go.domains.live.com , which also has a corresponding reverse pointer.
99v.cn,
u86.com,
dugn.net,
jzvan.com,
yjmdh.com and at least 100 other hosts point to the same IP.
pup.edu.ph use this as a mailserver.
pup.edu.ph is delegated to two nameservers, however one delegated nameserver is missing in the zone. All nameservers are having a total of three IP numbers. Two of them are on the same IP network. Incoming mail for
pup.edu.ph is handled by three mailservers at
pup.edu.ph themselves having a total of four IP numbers. Two of them are on the same IP network.
mail.pup.edu.ph is hosted on a server in United States even though the hostname implies Philippines.