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* Patrick Beard <patrick@???> [20031212 15:52]: wrote:
> Hi,
>
> I am using Exim 3.35 on Debian Woody as a relay for our Exchange server. The
> relay is in our DMZ on a private IP and is accessible from the outside via a
> mapped public IP address.
> I am trying to get it to accept email to the postmaster when the IP of the
> server is used in the address (postmaster@???). So far I have
> not managed to succeed. All attempts have ended with;
> 550 - relaying to <postmaster@???> prohibited by administrator
> (failed to find host name from IP address).
>
> What am I missing?
domain literals.
In configure.default, there is this text:
# If you want to accept mail addressed to your host's literal IP address, for
# example, mail addressed to "user@???", then uncomment the
# following line, or supply the literal domain(s) as part of "local_domains"
# above. You also need to comment "forbid_domain_literals" below. This is not
# recommended for today's Internet.
#local_domains_include_host_literals
# The following line prevents Exim from recognizing addresses of the form
# "user@???" that is, with a "domain literal" (an IP address)
# instead of a named domain. The RFCs still require this form, but it makes
# little sense to permit mail to be sent to specific hosts by their IP address
# in the modern Internet, and this ancient format has been used by those
# seeking to abuse hosts by using them for unwanted relaying. If you really
# do want to support domain literals, remove the following line, and see
# also the "domain_literal" router below.
#forbid_domain_literals
So because you want to allow mail addressed to your hostname, or to your IP
address, put these two options:
local_domains_include_host = true
local_domains_include_host_literals = true
DISCLAIMER: Apart from what Philip wrote about domain literals, I also add that
I disclaim responsibility if your server catches fire!
-Wash
http://www.netmeister.org/news/learn2quote.html
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