emailserver3.serverpoint.com has no SRV records.
Question and response
Question
dig emailserver3.serverpoint.com. SRV
Answer
The response has no answer records.
Authority
serverpoint.com. 1800 SOA ns1.serverpoint.com. dns.cloudflare.com. 2396157340 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0