smtp.st3.qemailserver.com has no SRV records.
Question and response
Question
dig smtp.st3.qemailserver.com. SRV
Answer
The response has no answer records.
Authority
qemailserver.com. 600 SOA pdns111.ultradns.com. hostmaster.qualtrics.com. 1771948721 3600 600 1209600 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0