ns2.totisp.net has no MX records.
Question and response
Question
dig ns2.totisp.net. MX
Answer
The response has no answer records.
Authority
totisp.net. 300 SOA ns1.totisp.net. admin.totisp.net. 2018112463 21600 7200 604800 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0