SysAdmin EM:
> Hello Wietse. Thank you for your answer, you are always attentive to
> everyone, you were very kind.
>
> I'm going to start using pcre, in the header_checks file I have certain
> locks to prevent sending spam or phishing.
>
> /^Subject: Invest once and get passive income.*/
> DISCARD SUBJECTSPAM2293
> /^Subject: Earnings on a trading robot.*/ DISCARD
> SUBJECTSPAM2294
> /^Subject: Working Online At Home.*/ DISCARD
> SUBJECTSPAM2295
> /^Subject: Netflix Je account.*/ DISCARD
> SUBJECTSPAM2296
> /^Subject: Mailbox Size Warning.*/ DISCARD
> SUBJECTSPAM2297
> /^Subject:.*Sunrise ritual.*/ DISCARD SUBJECTSPAM2298
> /^Subject:.*pending messages on hold.*/ DISCARD
> SUBJECTSPAM2299
First, DISCARD is not a nice way to eiminate spam if you have many
users.
Second, the .* at the end is not needed, but I do not expect that
is causing high CPU usage.
You can save lots of CPU if you have many Subject: patterns, by
using if-endif.
if /^Subject:/
# No whitespace before patterns between if-endif
/^Subject: *this/
/^Subject:.*that/
...
endif
With this, message headers that aren't a Subject will use very
little CPU.
Wietse
