dnsauth1.sys.gtei.net has no MX records.
Question and response
Question
dig dnsauth1.sys.gtei.net. MX
Answer
The response has no answer records.
Authority
sys.gtei.net. 1800 SOA dnsauth1.sys.gtei.net. dns.level3.net. 2011090700 3600 900 864000 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0