Greetings ...

I have a question about the configuration of my MX record for
send and receive emails from internet ..

I'm riding Zimbra 7 Opensource on centos 6.2 64 BITS

I have link to the Internet with public IP address ask them what
following:

I manage my domain provider domains ... (one third)

Should my provider to create the host and mx correo.miempresa.com and
make it point to my public IP?

I Do Ip nat between the Post and my mail server on
which ports?

What would be the correct configuration of dns in centos? the dns
my lan?

Attentive'm your comments .. Thanks in advance