You can use whichever features you choose. It's up to you.
Of course fighting spam is always a balancing act with a wide array of
dependencies. Finding the best balance takes some doing. The flexiblity
that spamyke provides makes it useful in most circumstances.
Note, I don't necessarily agree with your policy, but I don't see any
purpose in debating it here. If it works for you, great. However, you
can use a lot more of spamdyke's filters than one RBL, without getting
any false positives.
--
-Eric 'shubes'
Martin Waschbuesch wrote:
Thanks for the explanation Eric & Michael,
I would like to use SpamDyke, but only very ver conservatively. E.g. if I could
block people that I block now (cbl.abuseat.org) during SMTP, that would be
great. The other features like greylisting etc., I would not like to use.
My own policy (as long as my mail server has the bandwidth to handle it) is to
let anything in that *might* be legit. I know that people with wrong DNS setup
should not send out mail into the world like that, but I prefer this to just
add to their spam score in spamassassin instead of blocking people who just
don't know better. (They need educating, not blocking) and it IS hard to
explain false positives to endusers... As I explained in a different post, my
setup does not throw stuff away, but puts spam into a 'dubious looking' folder
and users have to decide what to do with it - which is what they got for
complaining about said false positives too often ;-)
Anyway, Is it possible to use SpamDyke for just that? a very conservative DNSBL
like abuseat and nothing else??
Martin
Am 21.06.2010 um 17:01 schrieb Eric Shubert:
I agree with Michael that spamdyke is great. Highly recommended.
I'd like to clarify the tcpserver -h option though. This option does do an rDNS
lookup which is duplicative with spamdyke, but I think it's best to do both, as
they're used for different purposes. Spamdyke uses rDNS for blocking.
Tcpserver's -h option simply sets the TCPREMOTEHOST variable, which does no
blocking of any kind, but does provide more complete logging messages. The
overhead of the duplicate rDNS lookup is negligible (immeasurable I expect),
since the lookup is cached. That's why I think it's best to have both.
Sam C (spamdyke's author) discusses this (and other things) here:
http://www.mail-archive.com/[email protected]/msg00842.html
--
-Eric 'shubes'
Michael Colvin wrote:
Are you using SpamDyke? If so, and you are checking for RDNS there, that
would seem duplicative to me. I block any mail server that does not have
RDNS using SpamDyke. Better to stop it there than waste time scanning it
with SpamAssassin...
Michael J. Colvin
NorCal Internet Services
www.norcalisp.com
-----Original Message-----
From: Martin Waschbuesch [mailto:[email protected]]
Sent: Sunday, June 20, 2010 1:57 AM
To: [email protected]
Subject: Re: [qmailtoaster] spamassassin
Found it myself:
In /var/qmail/supervise/smtp/run, I had forgotten to enable rDNS (default
seems to be off), by changing the -H flag to -h.
Thanks,
Martin
Am 20.06.2010 um 10:48 schrieb Martin Waschbuesch:
Hi all,
There is something weird I noticed in my logs: every email I receive
gets marked as RDNS_NONE by spamassassin. This was not the case with my
previous setup. lookup and reverse lookup work, so I am at a loss as to
why this is? Perhaps some perl module I have not installed, etc?
Martin
--
"Imagination is more important than knowledge. For knowledge is limited
to all we now know and understand, while imagination embraces the entire
world, and all there ever will be to know and understand."
Albert Einstein
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If you need professional help with your setup, contact them today!
---------------------------------------------------------------------------------
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(www.vickersconsulting.com)
Vickers Consulting Group offers Qmailtoaster support and installations.
If you need professional help with your setup, contact them today!
---------------------------------------------------------------------------------
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you can't have five wolves and one sheep voting on what to have for supper.”
Larry Flynt
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If you need professional help with your setup, contact them today!
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