User validation before scanning the mail?

Hello,
I'd like to know if it is possible to check if the recipient
is valid (for local domains) and after that to check the
message for spam and viruses.
The server receives 95% spam to non-existing mail addresses
for my domain. The server is P4 Xeon 5130 2x2Ghz. It
succeeded to scan around 22000 spam per hour, but I have the
problem described in the FAQ with the slow SMTP server.
If that check is possible I think that the load average will
fall 20-30 times.
Thanks in advance,
Nick

-----------------------------

Sportingbet.com
9,000 åâðî âñÿêà ñåäìèöà íàãðàäà çà 2 çëàòíè ñïîðòíè çàëîãà!
http://bg.sportingbet.com/t/index.aspx?affiliate=mailbg
10


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Hello,

use shupp toaster (www.shupp.org/toaster), implement patch
chkuser
(http://
www.interazioni.it/opensource/chkuser/) or there are
other
mechanism (for example using badmailto or oposite - using
only valid
emails - eg create list of all emails you have).

2007/10/19, nzaynelovmail.bg <nzaynelovmail.bg>:
> Hello,
> I'd like to know if it is possible to check if the
recipient
> is valid (for local domains) and after that to check
the
> message for spam and viruses.
> The server receives 95% spam to non-existing mail
addresses
> for my domain. The server is P4 Xeon 5130 2x2Ghz. It
> succeeded to scan around 22000 spam per hour, but I
have the
> problem described in the FAQ with the slow SMTP server.
> If that check is possible I think that the load average
will
> fall 20-30 times.
> Thanks in advance,
> Nick
>
> -----------------------------
>
> Sportingbet.com
> 9,000 Å×ÒÏ ×ÓÑËÁ ÓÅÄÍÉÃÁ ÎÁÇÒÁÄÁ ÚÁ 2 ÚÌÁÔÎÉ ÓÐÏÒÔÎÉ
ÚÁÌÏÇÁ!
> http://bg.sportingbet.com/t/index.aspx?affiliate=mailbg
10
>
>
>
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>


-- 
Lampa
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Lampa wrote:
> Hello,
>
> use shupp toaster (www.shupp.org/toaster), implement
patch chkuser
> (http://
www.interazioni.it/opensource/chkuser/) or there are
other
> mechanism (for example using badmailto or oposite -
using only valid
> emails - eg create list of all emails you have).
>   
i.e. this is such a fundamental problem that it must be
dealt with at
the Qmail level instead of within Qmail-Scanner. With the
overhead of
running perl, AVs and (especially) SpamAssassin, it just
isn't
appropriate to do this within Qmail-Scanner. Doing it within
Qmail
itself (i.e. a patch) will remove a huge amount of traffic
from even
getting to Qmail-Scanner.

I'd also suggest looking at the RECIPIENTS extension on
http://www.fehc
om.de/qmail/qmail.html

-- 
Cheers

Jason Haar
Information Security Manager, Trimble Navigation Ltd.
Phone: +64 3 9635 377 Fax: +64 3 9635 417
PGP Fingerprint: 7A2E 0407 C9A6 CAF6 2B9F 8422 C063 5EBB
FE1D 66D1


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