walter2.clarive.com has no MX records.
Question and response
Question
dig walter2.clarive.com. MX
Answer
The response has no answer records.
Authority
clarive.com. 1800 SOA brenda.ns.cloudflare.com. dns.cloudflare.com. 2396853342 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0