On 6/16/2024 9:06 AM, Wietse Venema via Postfix-users wrote:
# Don't indent text between IF and ENDIF.
IF /^MAIL FROM:/
/^MAIL FROM:<badstuff>/ QUIT
/^MAIL FROM:<badstuff>/ QUIT
...
ENDIF



Seems like if this is talking to a real MTA this would be a connection amplifier. The sending MTA would see this as a non-fatal error and keep retrying until their queue expires, possibly hundreds of times over several days. In that case a regular old access table, maybe with smtpd_delay_reject=no, would be a better choice.



  -- Noel Jones
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