mail.ufinet.com.gt has no CNAME records.
Question and response
Question
dig mail.ufinet.com.gt. NS
Answer
The response has no answer records.
Authority
ufinet.com.gt. 8548 SOA ns1.ufinetlatam.net. noclatam.ufinet.com. 2025101601 28800 7200 1209600 10800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0