as3.icg.net has no MX records.
Question and response
Question
dig as3.icg.net. MX
Answer
The response has no answer records.
Authority
icg.net. 3600 SOA ns7.customer.level3.net. dns.level3.net. 2024103003 7200 600 2592000 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0