kerns3.gslb.net has no MX records.
Question and response
Question
dig kerns3.gslb.net. MX
Answer
The response has no answer records.
Authority
gslb.net. 3600 SOA kerns1.gslb.net. dns.gslb.net. 2026021501 7200 1800 1209600 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0