Sending mail with no DNS

[Alan Wilson <awilson@accessus.net>]

Is it possible to send email to a linux box (permanantly on the net) with no
DNS, for example awilson@10.11.12.13?

When I attempt to, the email bounces back with something like:
550 <awilson@10.11.12.13>... Host unknown (Name server: 10.11.12.13: host not
found)

I have been trying to setup DNS on the machine (which here I call
10.11.12.13), but the message seems to suggest that it doesn't resolve itself.

Thanks
Alan

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