outbound.smtp.wisestamp.net has no SRV records.
Question and response
Question
dig outbound.smtp.wisestamp.net. SRV
Answer
The response has no answer records.
Authority
wisestamp.net. 600 SOA ns31.domaincontrol.com. dns.jomax.net. 2026030105 28800 7200 604800 600
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0