static.c300.guam.net has no MX records.
Question and response
Question
dig static.c300.guam.net. MX
Answer
The response has no answer records.
Authority
static.c300.guam.net. 3600 SOA NS.guam.net. HostMaster.ns.guam.net. 2010080302 3600 3600 3600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0