ans3.terra.net.lb has no MX records.
Question and response
Question
dig ans3.terra.net.lb. MX
Answer
The response has no answer records.
Authority
terra.net.lb. 86400 SOA ns1.terra.net.lb. dns-admin.terra.net.lb. 2026022600 14400 3600 604800 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0