sys.gtei.net has no TXT records.
Question and response
Question
dig sys.gtei.net. TXT
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