netflow-iig.summitiig.net has no MX records.
Question and response
Question
dig netflow-iig.summitiig.net. MX
Answer
The response has no answer records.
Authority
summitiig.net. 10800 SOA ns1.summitiig.net. admin.summitiig.net. 2021100933 3600 3600 604800 10800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0