Configuração de Servidor Dns

Preciso otimizar meu dominio e servidor para máxima entrega de emails (disparos de email marketing).

Segundo o teste do site http://mxtoolbox.com/ tenho 12 problemas que precisam ser resolvidos, conforme lista abaixo:

    Category    Host        Result    
    dmarc    dominio.com.br    Record Missing
    blacklist    dominio.com.br    Blacklisted by FABELSOURCES
    https    dominio.com.br    The Certificate has a name mismatch
    dns        dominio.com.br    Primary Name Server Not Listed At Parent
    dns        dominio.com.br    At least one name server failed to respond in a timely manner
    dns        dominio.com.br    Local NS list does not match Parent NS list
    dns        dominio.com.br    Name Servers are on the Same Subnet    
    dns        dominio.com.br    SOA Refresh Value is outside of the recommended range
    dns        dominio.com.br    SOA Expire Value out of recommended range
    smtp    dominio.com.br    Reverse DNS does not contain the hostname
    smtp    dominio.com.br    5.657 seconds - Warning on Connection time
    smtp    dominio.com.br    12.532 seconds - Not good! on Transaction Time