rb.aus.efscloud.net has no TXT records.
Question and response
Question
dig rb.aus.efscloud.net. TXT
Answer
The response has no answer records.
Authority
rb.aus.efscloud.net. 600 SOA ns1.efscloud.net. root.efscloud.net. 1 7200 900 3600000 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0