www.g2server.net has no MX records.
Question and response
Question
dig www.g2server.net. MX
Answer
The response has no answer records.
Authority
g2server.net. 1800 SOA ns1.geetoo.com. hostmaster.geetoo.com. 20181175 1200 600 1209600 1800
Additional
. 0 OPT ; payload 4000, xrcode 0, version 0, flags 0