> I will use Postfix as Mailrelay to filter out Mails from three different
> Source Systems to Forward to different eMail Recipients. See as following
> Source System 1
> Mailto:xy@anydomain >Allow to any
> Source System 2
> Mailto:xy@anydomain >Forwarding to @test1.com
> Source System 3
> Mailto:[hidden email] >Forwarding to @test1.com and @test2.com
Postfix envelope recipient address rewriting is largely independent
of client identities and envelope sender addresses.
The only way to do this is with access(5) checks, which can trigger
BCC, REDIRECT or FILTER actions.