Re: [exim] conditional transport filters?

On 06/05/16 15:42, Chris Siebenmann wrote:
>> - Lose router "unseen"
>
> We have several routers that use 'unseen = true'. If this is now
> considered a bad idea, what's the best mechanism to make copies of a
> message on the way through and send them to specific destinations?

A redirect router, with data of $local_part@$domain, <extra_copy_dest>

(as to "why considered a bad idea" - functionality duplicated by
the above, header-manipulation semantics oddities, delivery error
semantics oddities)


>> There are other ideas buried in the bugs which are more far-reaching.
>> Reducing the number of languages involved in an exim config was one (I
>> count: ACL, retries, router-chain, authenticators, exim-filter...).
>
> If one is going to go for wholesale configuration rewriting, I would
> agitate for creating or embedding a real programming language. String
> expansion plus carefully ordering routers/ACLs/etc can do a great deal,
> but it is not exactly clear and I think it would be quite improved if
> you could directly express ACL logic and routing logic.
>
> (I suppose the modern low-ish-effort version is embedded Lua with
> hooks and so on exposed.)

Interesting. What do you feel is lacking from ACLs in making them
"a real programming language"?

Same question for routers?

--
Cheers,
Jeremy