Thanks for all the suggestions:
- I have an SPF record, but postfix not rejecting these, presumably
because the enveloper sender is valid
- I am not using SpamAssassin, but I'm coming round to the idea!
- John: this idea seems simple and effective, I will give it a try.
Many thanks,
Ian
Le 23/04/2019 à 18:02, John Peach a écrit :
On 4/23/19 11:54 AM, Ralph Seichter wrote:
* John Peach:
/^From:.*\@example\.com/ REJECT
This header check will not catch the envelope sender, so I suggest
adding "check_sender_access pcre:/path/to/sender_access" to the mix
(file content according to your needs, of course).
It is not meant to catch the envelope sender. That should be in your
normal checks. This is specifically for the data From:, which is what
these are using.
-Ralph
