Re: [Exim] Blocking of unknown users...

Michelle Konzack wrote:
>
> It is possibel for exim v4 to reject this mails immediately by
> checking the headers ???
>
> This will limit the traffic to some 100 Bytes and not 10 or more
> kBytes each message.
>
> The Client-Mailserver must accecpt only registerd users and
> nothing else.
>
You could check out
verify = recipient
in the ACL section. Just make sure that you don't have any routers
that will accept any and all recpients (like some virus/spam scanning
routers do).
John