Hello,

there was a mistake in what I reported before...

Really with this definition in /etc/amavisd.conf:

@bypass_spam_checks_maps = ( [ "!.sttspa.it", "." ] );

All works fine, and following there is the demonstration...

It follows three example of spam email sending with using the definition
above:

1) internal->external (Not checked)
Sep 22 12:11:33 av4 amavis[19337]: (19337) Passed CLEAN, [10.3.252.117]
<[EMAIL PROTECTED]> -> <[EMAIL PROTECTED]>, Message-ID:
<[EMAIL PROTECTED]>, Hits: -, 548 ms

2)external->internal (Checked)
Sep 22 12:15:00 av4 amavis[20969]: (20969) Blocked SPAM, [193.70.192.90]
<[EMAIL PROTECTED]> -> <[EMAIL PROTECTED]>, Message-ID:
<[EMAIL PROTECTED]>, Hits: 18.257, 4201 ms

3)internal->internal(Cheked)
Sep 22 12:16:18 av4 amavis[20969]: (20969) Blocked SPAM, [10.3.252.117]
<[EMAIL PROTECTED]> -> <[EMAIL PROTECTED]>, Message-ID:
<[EMAIL PROTECTED]>, Hits: 11.073, 3657 ms

(BTW, I'ld like to understand why if bypass_spam_checks_maps works on
recipient email address, then the definition above works on sender email
address... Misterious!!!)

So, clearly, the example in my previous email referenced to a situation
where the definition above wasn't installed... :((

Now, Ild like to (in orther of preference):

1) not scan even internal-> internal email
2) select what email scan based on source IP address

Any hint?

BR,

rocsca
----- Original Message ----- 
From: "Mark Martinec" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Thursday, September 22, 2005 10:47 AM
Subject: Re: [AMaViS-user] Avoiding spam scan on message originating from my
network/s


> Rocco,
>
> > > # a practical application: don't check outgoing mail for spam:
> > But this comment is too clear for me: It says that It disable spam for
> > outgoing mail... So I thought that this set does what I need!  :(
>
> It does exactly what it say. It affects outgoing mail.
>
> It does not affect all-internal mail, because sender address can not be
> trusted and therefore can not be used to decide if mail is internal to
> internal.
>
> To affect all mail originating from inside (which is both the
> internal to external, and internal to internal), the only reliable way
> is to base a check on a client IP address (or some other reliable
> information like TLS) determined by MTA. The MYNETS / XFORWARD
> combination is most handy, but such information can be passed from
> MTA to amavisd by sending such mail for checking on a dedicated
> amavisd port where another policy bank would be waiting
> (or even bypassing amavisd entirely and sending directly to MTA-TX).
>
> In the absence of the information from MTA that the client is
> internal (or otherwise trusted), the next best thing to do is
> to use @bypass_spam_checks_maps = ( [ "!.$mydomain", "." ] );
>
> >From Gary V:
> > @bypass_spam_checks_maps =
(\read_hash("/var/amavis/enable_spam_checks"),1);
> No backslash there, the read_hash will return a reference to a hash:
> @bypass_spam_checks_maps = (read_hash("/var/amavis/enable_spam_checks"),
1);
>
>   Mark
>
>
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