Split DNS and MX records

[Kevin Darcy]

So what's the problem? Internet mail servers deliver mail to your firewall.
Your firewall then uses the internal DNS, which has a *different* MX record
pointing to whatever internal server handles incoming mail. What am I
missing here?


- Kevin

"Pedersen, Peter (CPHXA)" wrote:

> Hi,
>
> we run split DNS with firewall-dns and internal dns-servers (forward to
> firewall-DNS).
> The problems is related to the MX records and mail delivery.
>
> external zone, foo.com:
>
> foo.com.                IN MX 10 mail.foo.com. # external mail server
> (firewall)
> mail.foo.com.           IN A xxx.xxx.xxx.xxx   # ip address of firewall
> external interface
> www.foo.com.            IN A zzz.zzz.zzz.zzz   #