filter.linktechs.email has no CNAME records.
Question and response
Question
dig filter.linktechs.email. NS
Answer
The response has no answer records.
Authority
linktechs.email. 3545 SOA ns1.linktechs.net. dmburgess.linktechs.net. 2025120156 900 600 86400 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0