elasticmail.marchingorder.com has no SRV records.
Question and response
Question
dig elasticmail.marchingorder.com. SRV
Answer
The response has no answer records.
Authority
marchingorder.com. 1800 SOA hal.ns.cloudflare.com. dns.cloudflare.com. 2396717953 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0