static.100.myactv.net has no MX records.
Question and response
Question
dig static.100.myactv.net. MX
Answer
The response has no answer records.
Authority
myactv.net. 600 SOA ns1.myactv.net. root.ns1.myactv.net. 2025091501 3600 600 1209600 600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0