crash.sothistelecom.com has no MX records.
Question and response
Question
dig crash.sothistelecom.com. MX
Answer
The response has no answer records.
Authority
sothistelecom.com. 1800 SOA kanye.ns.cloudflare.com. dns.cloudflare.com. 2397377258 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0