On 28/04/23 03:59, Sebastian Wiesinger via Postfix-users wrote:
> I'm not sure if I'm missing something but I can't find out why my
> body_checks doesn't catch all the backscatter I'm getting right now.
May 3, 2023 at 1:43 PM, "Peter via Postfix-users" <postfix-users@postfix.org>
wrote:
I've found that the best way to block backscatter is by using the backscatter
DNSRBL. Make sure you follow the instructions for setting it up properly:
https://www.backscatterer.org/?target=usage
If used correctly it will only block DSNs from known backscatter sources.
On 03.05.23 05:51, Ken Peng via Postfix-users wrote:
But anybody can use our (even setup correctly) mailserver as backscatter source?
can they?
I think only if you accept mail and then bounce.
otherwise, only if user set up incorrect forwarding or there are problems
with delivery (full quota), but I'm not sure whether this can get you listed
at backscatterer
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