Do I need MX record at all?

[Brett]

On Tue, 19 Apr 2005 unix at edify.com wrote:

>
> Hi
> 	I have read the DNS and BIND book and do understand the importance
> of a MX record. This weekend, I am making changes to the MX records with
> names and priority numbers.
>
> 	I would like to know if MX record is needed at all reason is I am
> using Sendmail (8.12.11)on the same DNS server that uses mailertable which
> has entries to tell where it needs to pass on email. I have Checkpoint FW
> rules to tell how the email should be routed, so do I really need MX record
> for the outside world to tell where email should be delivered to. Below is
> my architecture.
>
> Inbound email --> Checkpoint Firewall --> SMTP relay (in DMZ) running BIND
> and Sendmail --> Exchange (internal).
>
> I will appreciate if someone clarifies this for me. TIA.

You need an MX record so that clients on the internet know where to
send e-mail (not strictly true as in the absense of an MX thye will
try to deliver mail to the A record, but trust me its better to have one)

-- 
Brett Carr				Ripe Network Coordination Centre
System Engineer -- Operations Group     Singel 258 Amsterdam NL



>
> Ragu
>
>