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Documentation
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Question
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Last Modified: Mar 09, 2003
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| Do you provide any tools or software that prevents your members from recieving spam? |
| Answer |
Yes, we have Spam Assassin installed. It's a great package
that adds headers and appends a brief tag to the subject when
it detects spam.
Spam can be too much of a grey area for us to block it
completely, so we're leaving the filtering and blocking
in your (the client's) capable hands. There are
several ways to filter spam in your mail client now
that we are scanning it and assigning it a spam score:
Method #1: Subject line blocking.
Our system will add the text {Possible Spam?} to
the subject for mail with a Spam Assassin index higher
than 5. If you want to filter possible spam, just look
for that text in your subject line filters.
Our system will add the text {Likely Spam} to
the subject for mail with a Spam Assassin index higher
than 20. This is similar to the prior rule, but this
will catch the messages that are highly likely to be spam.
Our webmail filter system can use this method of
blocking spam. Just click "Options", "Filters", "Edit
your filter rules", then add the appropriate subject
line filters for the text mentioned above.
Method #2: Mail header blocking.
All mail passing through our cluster will now have two
new headers added to them:
X-MailScanner-SpamCheck:
X-MailScanner-SpamScore:
The first header will have details about the actual
spam check. The second will have a spam score. For
each point toward the spam score, a single s
character will be appended. So for a mail with a spam
score of 7, the header will look like this:
X-MailScanner-SpamScore: sssssss
Thus if you wanted to filter spam with a score of 15 or
higher, you could simply check for 15 s's in a row.
We believe (but are not certain) that Outlook and
Procmail can support this method. We do not believe
Outlook express supports it. Contact your mail client
software vendor for details and/or assistance.
Note that we do run procmail. So if you want to setup
a .procmailrc file in your home directory to play with
this type of filtering, feel free. Please be careful
though, it's all too easy to lose incoming mail with
typos in your .procmailrc file.
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