Dial1.Philadelphia1.Level3.net has no MX records.
Question and response
Question
dig Dial1.Philadelphia1.Level3.net. MX
Answer
The response has no answer records.
Authority
Dial1.Philadelphia1.Level3.net. 3600 SOA poolns1.Level3.net. dns.level3.net. 2022082900 7200 600 2592000 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0