beta-mx2.spamtador.com has no MX records.
Question and response
Question
dig beta-mx2.spamtador.com. MX
Answer
The response has no answer records.
Authority
spamtador.com. 86400 SOA ns7.nsprimario.com. soporte.adw.es. 2026022504 10800 3600 86400 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0