Re: [exim] variables at acls

Hi,

> wild guess: expand a system filter either to a subject rewrite or to a
> no-op.

this wouldn't work:

system_filter: This option specifies an Exim filter file that is applied
to all messages at the start of each delivery attempt, before any
routing is done.

We also handle email-forwardings and rewriting and adding headers shall
only be done on incoming mail.

Regards
Marten