static.chello.sk has no MX records.
Question and response
Question
dig static.chello.sk. MX
Answer
The response has no answer records.
Authority
static.chello.sk. 60 SOA rns1.upc.biz. hostmaster.chello.at. 1 3600 600 604800 60
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0