ns303.adobe.net has no MX records.
Question and response
Question
dig ns303.adobe.net. MX
Answer
The response has no answer records.
Authority
adobe.net. 60 SOA ns101.adobe.net. dnsadmin.omniture.com. 2026022200 900 3600 604800 60
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0