o1.ptr656.accela.com has no MX records.
Question and response
Question
dig o1.ptr656.accela.com. MX
Answer
The response has no answer records.
Authority
accela.com. 1800 SOA ram.ns.cloudflare.com. dns.cloudflare.com. 2397130068 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0