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Spamcop is NOT ever reliable for deleting spam, as one of
several tests its ok but never ever based on them alone.
An example. The largest broadband company here in Norway
tries to force all there customers to use there mailservers as SMTP, they ended
up on Spamcop's list in 72 hours.
Most mail came through but a lot of people lost mail
because of idiots using spamcop as a test for deleting mail.
Benny
John,
I
didn't say that. In my case I haven't received any legitimate email from those
domains and I do receive a considerable amount of spam from them, so I tend to
treat them accordingly.
To
answer the original question, in my case SpamCop is very, very
effective and I use it aggressively. I rarely see a false positive. But as I
said, everyone has different needs. I'm not trying to disagree with anyone
posting here about their experiences and practices. Just relaying my
experience.
Shayne
So, if I sent you
a message from my home ISP account, which is Adelphia, you would
automatically consider it spam?
John
Tolmachoff
Engineer/Consultant/Owner
eServices For
You
-----Original
Message-----
From:
[EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Shayne Embry
Sent: Wednesday,
April 28, 2004
6:46
AM
To:
[EMAIL PROTECTED]
Subject: RE: [Declude.JunkMail] How
accurate is spamcop
Personally, I don't
consider this a problem with SpamCop. I understand that different people
have different needs, but in my case every message entering my system from
adelphia.net and wanadoo.fr is spam.
-----Original
Message-----
From:
[EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Matt
Sent: Tuesday, April
27, 2004 6:21
PM
To:
[EMAIL PROTECTED]
Subject: Re: [Declude.JunkMail] How
accurate is spamcop
SpamCop has a serious problem with blacklisting
large ISP mail servers. Just yesterday I had three false positives
partially caused by SpamCop weighted at about 45% of my hold weight for
the domains in question, and hitting E-mail coming from adelphia.net,
wanadoo.fr and netvision.net.il, all large ISP mail servers. Based
on my review of SpamCop on these ISP mail servers, I estimate that they
have between a 1 in 20 and a 1 in 50 chance of a message getting
improperly tagged when they come through such an ISP. This also
caries over to the likes of AOL and Road Runner.
I once contacted
one of their "Deputies" about the issue and their response was that
"SpamCop is aggressive." Unfortunately their failure to resolve this
long-standing problem of treating an ISP mail server that sends 99.99%
legit E-mail just the same as a mail server belonging to a spam house
weakens the value of their blacklist a great deal and causes
administrators like ourselves a lot of frustration that something so
obvious couldn't be corrected.
SpamCop also has a fundamental flaw
in that submitted spam that gets forwarded from one server to a
destination often causes the forwarding server to get tagged, and forged
headers can also trick them from time to time.
I would suggest
weighting SpamCop at no more than 60% of your hold weight, and add as many
reliable tests as possible. SpamCop is however a very important
test, and it accurately flags about 2/3 of the spam reaching my
server.
Matt
Doris Dean
wrote:
Is it safe to simply delete an email flagged with
spamcop?
-- ===================================================== MailPure custom filters for Declude JunkMail Pro. http://www.mailpure.com/software/ =====================================================
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