On Mon, Feb 27, 2023 at 11:08:47AM -0300, Rafael Azevedo wrote:
> For every sent message we want to add a footer with a counter.
Whatever...
> I've tried to add the "content_filter" tag as shown:
>
> smtp inet n - n - 50 smtpd
> -o content_filter=footer
This will add a content filter to messages that arriva via SMTP on port 25.
> footer unix - n n - - pipe
> flags=Rq user=myuser argv=/home/postfix/tag.sh ${sender} ${recipient}
This will pass the message to the "tag.sh" program (which has to be very
careful with its untrusted arguments, non-experts generally get this
wrong).
> But the messages doesn't seem to be filtered.
>
> $ postconf | grep content_filter
> content_filter = (empty)
Why do you expect the output of "postconf" (main.cf) to reflect the
service-specific override in master.cf? To master.cf settings,
try "postconf -M" or "postconf -P".
> Is this supposed to work? Is there a workaround for this?
Content filters work as documented. Shell scripts used as content
filters should go through security review.
--
Viktor.
