host23.online.az has no MX records.
Question and response
Question
dig host23.online.az. MX
Answer
The response has no answer records.
Authority
online.az. 86400 SOA ns1.online.az. root.online.az. 2026030501 3600 1800 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0