kheops.tdp.net.pe has no MX records.
Question and response
Question
dig kheops.tdp.net.pe. MX
Answer
The response has no answer records.
Authority
tdp.net.pe. 86400 SOA huascaran.tdp.net.pe. root.tdp.net.pe. 2008121769 10800 3600 604800 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0