main.ifastnet.com has no MX records.
Question and response
Question
dig main.ifastnet.com. MX
Answer
The response has no answer records.
Authority
ifastnet.com. 952 SOA ns1.ifastnet.org. response.ifastnet.com. 2016121418 3660 951 604810 952
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0