mx-bkp.fodonto.uncu.edu.ar has no MX records.
Question and response
Question
dig mx-bkp.fodonto.uncu.edu.ar. MX
Answer
The response has no answer records.
Authority
fodonto.uncu.edu.ar. 3600 SOA ns1.fodonto.uncu.edu.ar. hostmaster.fodonto.uncu.edu.ar. 2025120901 7200 3600 1209600 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0