On Feb 14, 2006, at 11:41 AM, Harry Corsover wrote:
On Feb 14, 2006, at 11:09 AM, Bruce Johnson wrote:
Ours score in three levels: not spam, Spammish and Definitely Spam.
DefinitelySpam (scoring, iirc, > 15, where we've set a score of 4+
means Spam) goes right into the bit bucket. No way should a
legitimate e-mail look like that.
Spammish, 4-15, gets sent through to the client. We flag the
Subject line with ***SPAM*** to make it easy to sort out, and set
the X-Spam-Status=Yes
I don't know your ISP or your system,
We are our own ISP, which is incredibly convenient. We're using
SpamAssasin <http://spamassassin.apache.org/> to do our filtering.
but I do know that in my business, I talk with people (who have
posted their resume on Monster.com, for instance) on the phone,
then send them information if they're interested. The Subject reads
"Business Information from Harry Corsover" and the body is short,
giving them my business web site and confirming the time we've
arranged for a follow-up phone call. I don't use my email signature
in those emails.
Yet, fairly often, these wind up filtered out or labeled as spam,
and my prospect or potential customer never sees the email.
This is the part they get wrong...they're just deleting or making the
mail difficult to access if it's marked spam. Our approach is to send
along anything that could possibly be marginal, just label it as
spam. This is the approach we've taken, it's made e-mail far more
usable for our users. A sizeable chunk of spam does flow to the end
user, to be trapped by their junk filters.
This multi-layered approach has worked well for us.
This, to me, is unacceptable, since by no reasonable definition is
my email spam. And this costs me time and money.
Without knowing HOW the other end is filtering the e-mails, I
couldn't tell you. I do know that OUR system puts all the details in
the mail headers:
Date: Tue, 14 Feb 2006 10:30:05 -0800 (PST)
X-Virus-Scanned: amavisd-new at pharmacy.arizona.edu
X-Spam-Status: Yes, hits=5.372 tagged_above=-999 required=4 tests=
[AWL=0.150,
BAYES_40=-1, FUZZY_AMBIEN=1, SARE_UND=2.222, URIBL_BLACK=3]
X-Spam-Level: *****
X-Spam-Flag: YES
Which tells us exactly why this message was classified as spam. As it
happens, this is from a false positive, it's an e-mail newsletter I'm
susbcribed to. I could go in and tweak the various tests to get this
one to pass (it usually does, in fact), or collect this message and
train it back into the system as non-spam.
I've also seen quite normal-looking emails replying to a post on a
professional email list with "SPAM" inserted into the subject line.
Sometimes these show up with list email, and sometimes Mail puts
them in my junk folder.
How do you know your system produces no false positives?
I never said that it did. I said we take steps to reduce them to a
tolerable level. I believe my exact words were something like "a few
per week".
Tell you what, send me (offlist) a message like what you're
describing, I'll tell you how OUR system scored it and why.
--
Bruce Johnson
This is the sig who says 'Ni!'
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