How to configure multiple postfix content filters?

[Mike Schleif]

On Fri, Mar 4, 2016 at 8:02 AM, Mike Schleif <mike at mdsresource.net> wrote:

> On Thu, Mar 3, 2016 at 3:39 PM, Patrick Ben Koetter <p at sys4.de> wrote:
>
>> Mike,
>>
>> * Mike Schleif <mike at mdsresource.net>:
>> > Original filter-only:
>> > master.cf:
>> > smtp  inet  n  -  n  -  -  smtpd
>> >   -o content_filter=filter:dummy
>> >
>> > filter  unix  -  n  n  -  10  pipe
>> >   flags=Rq user=filter null_sender=
>> >   argv=/var/spool/filter/bin/filter.sh -f ${sender} -- ${recipient}
>>
>> what is it, that filter.sh does? Is it something amavis can do as well?
>> I'm asking because maybe we can simplify your setup.
>>
>
> No.
>
> This server was built to consolidate several legacy servers, primarily to
> do special header rewrites for a subset of all email received by this
> company. It is unique code developed to do such rewrites and it does it
> well.
>
> After several months of doing this task without incident, others decided
> to retrofit spam & av to this box, which had been done problematically
> elsewhere.
>
> I think that I have this working; but, I'm totally new to amavis, and I'm
> no expert on postfix. I want to find the simplest way to chain these
> processes, set it and forget it ...
>
> Thank you.
>

I have (4) questions at this point:

1) Can "filter" be run from amavisd?

2) If "filter" can be run from amavisd, should it?

3) Is it best to run "filter" from postfix? If so, how?
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