mail.memset.com has no TXT records.
Question and response
Question
dig mail.memset.com. TXT
Answer
The response has no answer records.
Authority
memset.com. 2560 SOA ns1.memset.com. hostmaster.memset.com. 1771763416 16384 2048 1048576 2560
Additional
. 0 OPT ; payload 1680, xrcode 0, version 0, flags 0