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Always interested in offers/projects/new ideas. Eclectic experience in fields like: numerical computing; Python web; Java enterprise; functional languages; GPGPU; SQL databases; etc. Based in Santiago, Chile; telecommute worldwide. CV; email.

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Dropping Less Spam at ISP

From: "andrew cooke" <andrew@...>

Date: Sat, 4 Aug 2007 20:30:39 -0400 (CLT)

Earlier I described how I dropped spam at my ISP -
http://www.acooke.org/cute/DroppingMo0.html

I am now trying a new tactic.  Instead of dropping that spam, I collect it
and use it to train Spam Assassin.  At the same time, however, I don't
want to lose the big advantage that ISP filtering gave me - that if my
computer dies, or my connection goes down - I don't have a zillion extra
useless emails to download later.

So what I needed was a way to enable the filter described above when I had
a backlog of messages.  Equivalently: a way to disable teh filter during
normal use.

I came up with the following.  It could be made slightly faster by using
procmail's scoring (ie using the number of emails directly), but I don't
think that's a significant problem and this approach also helps remind me
how to use variables...

This is the extra added to the ISP procmailrc (obvious linebreaks added
for ease of reading):

SHELL=/bin/bash
MANY = `echo \$((\`mailutil check /var/spool/mail/acooke
  | sed -e "s/^\\([0-9]\\{1,99\\}\\).*/\\1/"
  | sed -e "s/^No.*/0/"\` > 10))`

:0
* ! MANY ?? 0
* ^(To|Cc|Bcc)[ :].*@acooke.org
[rest of previous recipe follows]

And then locally I have routing to sa-learn --spam etc.

Seems to work!  :o)

Andrew

Error in Regex

From: "andrew cooke" <andrew@...>

Date: Fri, 10 Aug 2007 10:42:52 -0400 (CLT)

That should read

MANY = `echo \$((\`mailutil check /var/spool/mail/acooke
   | sed -e "s/^.*(\\([0-9]\\{1,99\\}\\).*/\\1/"
   | sed -e "s/^No.*/0/"\` > 10))`

so that it picks up the total number in the mailbox.

Andrew

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