On Wed, 8 Jul 1998, Andreas Edler wrote:
> for an intranet mailserver I want to do rewriting only if the
> recipient is not in the $local_domain.
>
> *@intra.net \
> {if recipient is not in $local_domain} user@??? \
> Ffs
>
> Is this possible and how do I have to write my rewriting rule?
In general it is not possible, because a message may have many
recipients, so you can't talk about "the recipient".
Or do you mean do rewriting only if the domain of the address being
rewritten is not a local domain? You could do that by putting your local
domains in a file, setting
local_domains = lsearch;/list/of/local/domains
and using a rewriting rule of the form
*@* "${lookup {$domain}lsearch{/list/of/local/domains}\
{$1@$2}{<whatever rewriting you want>}}" <flags>
However, this is inelegant, because for local domains it does rewrite,
but to what it was before.
A less expensive, but slightly more dodgy technique is
LOCAL_DOMAINS = your.domain:your.other.domain
local_domains = LOCAL_DOMAINS
*@* "${if !match{LOCAL_DOMAINS}{${rxquote:$domain}}\
{<whatever rewriting you want>} fail}" <flags>
which does have the advantage of not doing a useless rewrite for local
domains, and doesn't require a file lookup. However, the test is
obviously only approximate. If you have only one local domain, you could
make it an exact test.
--
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