Si no sabes cómo comprobar si la configuración de tu dominio es correcta, o tienes algún problema y no sabes dónde está, puedes utilizar siguiente herramienta online para comprobar registros DNSs de tú dominio: http://www.dnssy.com
Te ayudará a comprobar el estado de los diferentes registros y te marcará si alguno no está bien configurado con breve descripción del problema (q es la mitad de la solución normalmente) o consejo para alguna mejora . El único inconveniente (para algunos) es que está en inglés.
Aquí os dejo el listado de registros DNSs que podéis comprobar con DNSsy:
Checking domain format
Checking for parent nameservers
Checking for parent glue
NS records at parent nameserver
Nameservers listed at parent
Glue at parent nameserver
Nameserver name validity
Nameserver A records
Nameserver A records match parent glue
NS records at your nameservers
Nameservers listed at your namservers
Glue at your nameservers
Nameserver A records match nameserver glue
Parent glue matches your glue
Nameservers match (parent)
Nameservers match (yours)
All nameservers responded
Only root nameservers returned
Any root nameservers returned
All of your nameservers match
All of your nameservers return an A record
Recursive lookups
Nameservers respond authoritatively
Nameserver name validity
Number of nameservers
CNAME returned
Nameservers on different class C
Nameservers on private IPs
SOA record
Number of SOA records
SOA Serial Match
SOA Master Nameserver Match
SOA Admin Email Match
SOA Refresh Match
SOA Retry Match
SOA Expire Match
SOA Minimum TTL Match
SOA Serial Number
SOA Master Nameserver
SOA Admin Email
SOA Refresh
SOA Retry
SOA Expire
SOA Minimum TTL
MX records
This is all of the MX servers I found.
All nameservers return same MX
MX records have A records
MX records have CNAMEs
MX records are IPs
MX records are valid
MX use public IP
MX IPs have reverse DNS
Testing Connection
Testing HELO
Testing null reverse path
Mail to local postmaster
Mail to domain postmaster
WWW record
WWW is public
Connecting to WWW server
Checking HTTP version
WWW server type
WWW server version
WWW home page
Espero q os sirva.
