autodiscover.metrocom.com.pa has no MX records.
Question and response
Question
dig autodiscover.metrocom.com.pa. MX
Answer
autodiscover.metrocom.com.pa. 5 CNAME mail.metrocom.com.pa.
Authority
metrocom.com.pa. 10800 SOA ns1.metrocom.com.pa. administrador.metrocom.com.pa. 2026022101 28800 7200 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0