ns2.geetoo.com has no MX records.
Question and response
Question
dig ns2.geetoo.com. MX
Answer
The response has no answer records.
Authority
geetoo.com. 300 SOA ns1.geetoo.com. hostmaster.geetoo.com. 521 1200 600 1209600 1800
Additional
. 0 OPT ; payload 4000, xrcode 0, version 0, flags 0