[exim] ACL question - Sender Verification

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Author: schönfeld / in-medias-res
Date:  
To: exim-users
Subject: [exim] ACL question - Sender Verification
Hi there,

i'm currently trying to improve our email setup in sense of spam
rejecting and therefore trying to setup a kind of Sender Verification
where Mails are rejected on SMTP-time, when all of the following
conditions are met:

* Sender Address is an e-mail address which is, by means of the domain,
considered to be local
* Sender Host is not an authorized mailserver (e.g. there is a hostlist
which holds each server which is allowed to send in emails with our
local-addresses)

Is this possible? If yes: How?

Best Regards

Patrick Schönfeld