pns.tinet.net has no MX records.
Question and response
Question
dig pns.tinet.net. MX
Answer
The response has no answer records.
Authority
tinet.net. 86400 SOA pns.tinet.net. netguard.tinet.net. 2022011400 43200 14400 2419200 172800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0