dns2.grazkom.at has no MX records.
Question and response
Question
dig dns2.grazkom.at. MX
Answer
The response has no answer records.
Authority
grazkom.at. 3600 SOA ns1.grazkom.at. hostmaster.grazkom.at. 2008082700 10800 3600 1209600 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0