autodiscover.othd.net has no MX records.
Question and response
Question
dig mail.es-omega.net. MX
Answer
The response has no answer records.
Authority
es-omega.net. 38400 SOA ns1.ornethd.net. noc.ornethd.net. 1565699691 10800 3600 604800 38400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0