mailsweeper.claro.com.ar has no MX records.
Question and response
Question
dig mailsweeper.claro.com.ar. MX
Answer
The response has no answer records.
Authority
claro.com.ar. 300 SOA ns1.claro.com.ar. nicmaster.claro.com.ar. 2023081713 300 300 1728000 300
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0