smtp-auth.waycom.net has no MX records.
Question and response
Question
dig smtp-auth.waycom.net. MX
Answer
The response has no answer records.
Authority
waycom.net. 600 SOA ns1.waycom.net. noc.waycom.net. 2026020300 86400 7200 3600000 600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0