mx3.orangecyberdefense.com has no SRV records.
Question and response
Question
dig mx3.orangecyberdefense.com. SRV
Answer
The response has no answer records.
Authority
orangecyberdefense.com. 3600 SOA dns1.equant.net. dns\.operations.orange.com. 2021121494 1200 300 1209600 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0