mail3.jobdivabk.com has no MX records.
Question and response
Question
dig mail3.jobdivabk.com. MX
Answer
The response has no answer records.
Authority
jobdivabk.com. 86400 SOA ns1.he.net. hostmaster.he.net. 2025110601 10800 1800 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0