Wietse Venema:
> Stefan Bauer:
> > hi,
> > 
> > smtp_header_checks = pcre:/etc/postfix/header_chk
> > 
> > /^Subject: .*test.*/ FILTER test:
> > 
> > Postfix then logs:
> > 
> > Jan 30 12:44:16 mx2 postfix/cleanup[19243]: 096B95EAE2: filter: header
> > Subject: some text test from mail-cloud-01.asdfasdf.tld[1.2.3.4];(...)
> > 
> > How to disable logging of this events? I simply do not want to have
> > sensitive informations (subject) in postfix logs.
> 
> Can you use an rsyslog filter for this? 
> https://www.rsyslog.com/doc/v8-stable/configuration/filters.html
> 
> An acceptable Postfix implementation would add a regexp/pcre lookup
> table to the Postfix syslog client code. Tinkering with individual
> header/body/access actions would not be acceptable.

Basically, a matchlist for strings, not domains or network addresses.

> The problem with not logging such actions is that you have no idea
> why Postfix is doing what it does.
> 
>       Wietse
> 

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