smtp.st3.qemailserver.com has no TXT records.
Question and response
Question
dig smtp.st3.qemailserver.com. TXT
Answer
The response has no answer records.
Authority
qemailserver.com. 600 SOA pdns111.ultradns.com. hostmaster.qualtrics.com. 1772477304 3600 600 1209600 600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0