relay20.uncu.edu.ar has no MX records.
Question and response
Question
dig relay20.uncu.edu.ar. MX
Answer
The response has no answer records.
Authority
uncu.edu.ar. 600 SOA raiz.uncu.edu.ar. hostmaster.uncu.edu.ar. 2026022302 600 600 600 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0