pch.ati.tn has no MX records.
Question and response
Question
dig pch.ati.tn. MX
Answer
The response has no answer records.
Authority
ati.tn. 10800 SOA ns4.ati.tn. hostmaster.ati.tn. 2026023509 21600 7200 1209600 10800
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0