mx.acens.net has no TXT records.
Question and response
Question
dig mx.acens.net. TXT
Answer
The response has no answer records.
Authority
acens.net. 7200 SOA ns1.acens.net. hostmaster.acens.net. 1772221068 14400 3600 604800 7200
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0