czmailserver.cloud4c.com has no SRV records.
Question and response
Question
dig czmailserver.cloud4c.com. SRV
Answer
The response has no answer records.
Authority
cloud4c.com. 100 SOA ns20.ctrls.in. hostmaster.ctrls.in. 2023020110 28800 7200 1209600 100
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0