Re: Spammer succeeded in relaying through my server

[Samer Afach]

Actually I would appreciate advice on how to do this on an internal 
environment. Is there a way to do this, like tools? The challenge is 
that I need an external email client to check IP addresses through the 
proxy, do the TLS communication, etc. My plan is to completely cut off 
relaying by setting mynetworks to localhost and mynetworks_style to 
host, then only launch the containers for short periods of time while I 
do the experiments. The containers will be running in foreground, which 
means I'll be seeing what's going on constantly. Finally, if I succeed 
with all that, I'll set the DNS records of my main domain, and wait for 
them to update. Once they're updated, I'll go to mxtoolbox and ensure 
that I don't have an open relay, confirm that that SPF and other things 
are fine.

Best regards,
Sam

On 22/12/2022 6:48 PM, Wietse Venema wrote:
It's good that you're willing to learn, but perhaps you can do some
experiments on a "internal" environment before exposing it to the
full internet.

        Wietse