Two way mail/virus scanning

I've just been setting up a maia box for one of our offices,
but they 
have a slightly different setup than I'm used to. They send
all their 
mail (both in and out) through the same box, while I usually
separate those.

Shouldn't be a problem, but it seems that outgoing mail is
also being 
checked for spam, is there a way I can prevent that? Other
than setting 
system default to no.

Using postfix as mta if anyone have a clever way to distinct
those.

Incoming is controlled by a transport-table, outgoing by
mynetworks.

-- 
Erik Weber
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Hi,

I am working with a setup like this one in the office. I had
to change
my main and master.cf to get this to work. Ill post the
piece I had to
change in my master.cf here:

#smtp      inet  n       -       -       -       -      
smtpd
10.10.10.11:smtp      inet  n       -       -       -      
-
smtpd
        -o content_filter=
        -o
smtpd_client_restrictions=permit_mynetworks,reject
127.0.0.1:smtp      inet  n       -       -       -       - 
     smtpd
        -o
smtpd_client_restrictions=permit_mynetworks,reject
10.10.11.12:smtp      inet  n       -       -       -      
-
smtpd
        -o content_filter=smtp-amavis:[127.0.0.1]:10024
        -o receive_override_options=no_address_mappings


I removed 'content_filter' from the main.cf and moved it to
master.cf

10.10.10.11 is the ip/nic on which the exchange server
connects to SEND
mail.
10.10.11.12 is the ip/nic on which the internet gateway is
connected, so
that's for RECEIVING.

The default smtp directive on the top is commented out to
make space for
these options.

For this to work, you need to have 2 ips connected on the
box to make it
a true mail router. I did not find a way to make this work
on a single
ip.

Rgds,

Michiel

-----Oorspronkelijk bericht-----
Van: maia-users-bouncesrenaissoft.com
[mailto:maia-users-bouncesrenaissoft.com] Namens Erik
Weber
Verzonden: donderdag 20 december 2007 14:40
Aan: Maia
Onderwerp: [Maia-users] Two way mail/virus scanning

I've just been setting up a maia box for one of our offices,
but they 
have a slightly different setup than I'm used to. They send
all their 
mail (both in and out) through the same box, while I usually
separate
those.

Shouldn't be a problem, but it seems that outgoing mail is
also being 
checked for spam, is there a way I can prevent that? Other
than setting 
system default to no.

Using postfix as mta if anyone have a clever way to distinct
those.

Incoming is controlled by a transport-table, outgoing by
mynetworks.

-- 
Erik Weber
_______________________________________________
Maia-users mailing list
Maia-usersrenaissoft.com
http://www.renaissoft.com/mailman/listinfo/maia-users
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Indien het e-mailbericht niet aan u is gericht, verzoeken
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The information contained in this communication is
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Michiel van den Berg wrote:
> Hi,
>
> [snip]
>
> For this to work, you need to have 2 ips connected on
the box to make it
> a true mail router. I did not find a way to make this
work on a single
> ip.
>
>   

Could probably do the trick, but when I think about it they
want virus 
filtering for outbound traffic, but not spam filtering.

-- 
Erik Weber
_______________________________________________
Maia-users mailing list
Maia-usersrenaissoft.com
http://www.renaissoft.com/mailman/listinfo/maia-users

In that case you have to take it to the amavis level, I have
no idea
about that. On the other hand we have the same virusscanner
(Mcaffee) on
the spamfilter as well as on the desktops, besides having
clamav also
running on the spamfilter it doesn't add anything on top of
mcaffee.

Michiel

-----Oorspronkelijk bericht-----
Van: Erik Weber [mailto:twiztargmail.com] 
Verzonden: donderdag 20 december 2007 15:33
Aan: Maia
CC: Michiel van den Berg
Onderwerp: Re: [Maia-users] Two way mail/virus scanning

Michiel van den Berg wrote:
> Hi,
>
> [snip]
>
> For this to work, you need to have 2 ips connected on
the box to make
it
> a true mail router. I did not find a way to make this
work on a single
> ip.
>
>   

Could probably do the trick, but when I think about it they
want virus 
filtering for outbound traffic, but not spam filtering.

-- 
Erik Weber
De informatie verzonden in dit e-mailbericht is
vertrouwelijk en is uitsluitend bestemd voor de
geadresseerde. Openbaarmaking, vermenigvuldiging,
verspreiding en/of verstrekking van deze informatie aan
derden is, behoudens voorafgaande schriftelijke toestemming
van Mooy Logistics, niet toegestaan. Mooy Logistics staat
niet in voor de juiste en volledige overbrenging van de
inhoud van een verzonden e-mailbericht, noch voor tijdige
ontvangst daarvan. Mooy Logistics kan niet garanderen dat
een verzonden e-mailbericht vrij is van virussen, noch dat
e-mailberichten
worden overgebracht zonder inbreuk of tussenkomst van
onbevoegde derden.
Indien het e-mailbericht niet aan u is gericht, verzoeken
wij u vriendelijk doch dringend het e-mailbericht te
retourneren aan de verzender en het origineel en eventuele
kopieën te verwijderen en te vernietigen.
------------------------------------------------
The information contained in this communication is
confidential and is intended solely for the use of the
individual or entity to whom it is addressed. You should not
copy, disclose or distribute this communication without the
authority of Mooy Logistics. Mooy Logistics is neither
liable for
the proper and complete transmission of the information
contained in this communication nor for any delay in its
receipt. Mooy Logistics does not guarantee that the
integrity of this communication has been maintained nor that
the communication is free of viruses, interceptions or
interference.
If you are not the intended recipient of this communication
please return the communication to the sender and delete and
destroy all copies.


_______________________________________________
Maia-users mailing list
Maia-usersrenaissoft.com
http://www.renaissoft.com/mailman/listinfo/maia-users

On Thu, 2007-12-20 at 15:32 +0100, Erik Weber wrote:

>  they want virus 
> filtering for outbound traffic, but not spam
filtering.

In that case. Maia has to be enabled for outbound filtering,
and you
control the spam filtering with amavisd settings. We do this
here for
exactly the same reason: we want internal mail scanned for
viruses, to
prevent spreading one that somehow manages to evade all our
scanners and
get inside. But we don't want to waste cycles filtering
internal mail
for spam. The way to do this is to set the mynetworks paramater in
amavisd.conf . This causes it to skip spamassassin filtering
for
anything that matches.

--Greg

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