Covington, Chris a écrit :
> 
> In my opinion, amavisd-new does not need DSPAM support.  As of 3.4.X or
> 3.6.X (I forget which) DSPAM can run in daemon mode as a LMTP 
> content-filter.  I use amavisd-new for banned files and A/V, then I have
> amavisd-new reinject the mail to Postfix which reinjects to DSPAM via 
> LMTP.  Problem solved.  I suppose it could be cleaner if amavisd-new
> could support reinjecting to a LMTP content-filter, but the performance
> is fine.
> 
> It looks like this:
> 
> postfix->amavisd-new->postfix->dspam lmtp daemon->postfix->mailstore
> 

I prefer the other way:

postfix->AV->postfix->dspam->[postfix]->amavisd-new/SA->postfix

AV may be an amavisd-new that doesn't run SA, or whatever you prefer.
(It may also implement policy banks if it's amavisd-new).

with:

- only mail destined to "filtered" domains. other mail may be processed
by SA if so desired.
- if mail is "innocent" for dspa, it is scanned by SA (to detect URI
spam and other "non textual" spam)
- if dspam confidence is lower than a configured level, pass to SA
- [optional] if rcpt wants SA anyway (or if his dictionary is still
immature), pass to SA

This way, most spam detected by dspam need not be scanned by SA. So SA
is "only" used to "detect missed spam". Thus its config may be "reduced"
(no need to have "porn" rules for instance, since one can train dspam
instead. This isn't true with "non-textual" patterns such as URIBL...).


> Mark, why don't you just drop DSPAM support (and maybe add LMTP 
> reinjection like $forward_method = 'lmtp:[127.0.0.1]:24')?  
> 

I think it is dspam which should support smtp. I don't find lmtp very
helpful in my case (I only tag. Scanners take no decision).

> I see no benefit of calling DSPAM in amavisd-new.
> 

Agreed. and being enabled by default causes some "surprises" (such as
having dspam headers twice when running a dspam daemon and forgetting to
disable the amavisd-new one).


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