nsrw4.mysrsx.com has no MX records.
Question and response
Question
dig nsrw4.mysrsx.com. MX
Answer
The response has no answer records.
Authority
mysrsx.com. 3600 SOA dns3.cloudns.net. support.cloudns.net. 2022090607 7200 1800 1209600 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0