_spf.qualtrics.com has no MX records.
Question and response
Question
dig _spf.qualtrics.com. MX
Answer
The response has no answer records.
Authority
qualtrics.com. 600 SOA pdns111.ultradns.biz. hostmaster.qualtrics.com. 1771766652 3600 600 1209600 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0