A "subject" rule for procmail

A "subject" rule for procmail

[Marco Calistri]

Hello I am receiving some spam with the following subject topic:

Sildenafil

so I tried to add the following rule into my .procmailrc file:

 :0
       * ^Subject:.*Sildenafil
       spam/.   

but only if the subject is exactly Sildenafil then message is moved to my spam
folder,infact if subject is a bit diffferent as for example:

RE:Sildenafil Citrate

then message pass through the inbox without any filtering.

How can I set the rule into procmailrc to block ALL Sildenafil topic subject ?

Thanks

Regards,Marco

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Re: A "subject" rule for procmail

[dashielljt]

You have now learned the futility of subject filters.  Perhaps a white
list filter would work better.  Unfortunately I don't know how to set one
of them up in procmail but have one set up and working in pine.  As a
stopgap measure in procmail, search for something like this, :0 HB
* prescription
spam


-- ----- That effectively searches both the header and body of the message
for prescription and tosses those messages into the spam folder.  I don't
send anything to /dev/null automatically.  I have a chance to look at it
before taking further action.  A white list filter's concept is there are
people and lists that don't send you spam; their addresses are put onto a
white list.  Everyone on that white list goes into your inbox, everyone
else goes into spam folder.  A further wrinkle on a white list filter is
the spam2go folder.  See when I search spam, I find some good e-mail in it
that won't be picked up by my white list just yet.  So I deal with that
e-mail accordingly and put the real spam into spam2go and then that
empties the spam folder.  That way when I next look at spam folder I'm not
looking at any old messages since any old spam was already put into
spam2go.  What happens to the contents of spam2go?  Well I enable display
of full headers and select all messages when spam2go count gets to 50
messages happens every two days now and forward all messages as a mime
digest to uce@ftc.gov.  Then I delete all messages from spam2go so it only
gets new spam for uce@ftc.gov to check out.  The federal trade commission
sometimes takes some action against spam artists and corporations that
sponsor spam when legal grounds can be found.GNU Linux a real operating
system with a clu
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Re: A "subject" rule for procmail

[Peter Edstrom]

Hello, Marco.

As have already been implied, subject filtering isn't the most reliable
way of handling spam. If spam is getting on you, then I really recommend
installing a bayesian spam filter, especially the one called 'bmf'. The
filter learns what is spam and what isn't, by analyzing your mail and
listen to your commands. After a while, you'll be totally spam free
(which I am now).

A real plus if you happen to use mutt as MUA.

You can find bmf at http://www.sourceforge.net/projects/bmf. Let me know
if you're having problem getting it to work, and I'll try to help you.

/Peter
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Re: (F)A "subject" rule for procmail

[Steven]

[-- Attachment #1: Type: text/plain, Size: 167 bytes --]

> How can I set the rule into procmailrc to block ALL Sildenafil topic subject ?
Try:

:0
* ^Subject:.*Sildenafil.*
spam/.   

Steven Smith,
sos22@cam.ac.uk.

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Re: A "subject" rule for procmail

[dashielljt]

With bmf, does it search a spam folder and learn from what you put into
it?  The thing is I delete good e-mail after I've finished reading it if
there's no further use for it but just because I deleted that e-mail
doesn't make it properly spam.

-- 
-----
GNU Linux a real operating system with a clu
ICQ: 204427655
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Re: A "subject" rule for procmail

[Peter Edstrom]

> With bmf, does it search a spam folder and learn from what you put into
> it?  The thing is I delete good e-mail after I've finished reading it if
> there's no further use for it but just because I deleted that e-mail
> doesn't make it properly spam.

This is kinda how it works:

When your mail is sent to procmail, procmail pipes it to the bmf program
to filter it. Bmf is looking at the headers as well as the message, and
compares it with keywords given in a database. If the mail is spam, a
new header 'X-Spam-Status' is set to 'Yes', and then the mail is
returned to procmail. Now you can make procmail check the X-Spam-Status,
and if spam it can either put the mail in a specific spam mailbox
(recommended), or to /dev/null.

If bmf misses a spam mail, you can mark the mail as spam which updates
the badlist-database. (This is very easy to do with eg. mutt, where you
can bind for instance F12 to do this). Similarly, if bmf happen to
filter a mail which isn't spam, you can remove it from the database (in
eg. mutt you can do this with for instance F11).

If you just delete a mail, it will not be marked as spam.

If there's something you don't understand, please let me know. I'm in a
little hurry now - I'm supposed to cook potatoes. ;-)

Hope this helps!
/Peter
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Re: (F)A "subject" rule for procmail

[Marco Calistri]

On 14-Sep-2003 Steven wrote:
>> How can I set the rule into procmailrc to block ALL Sildenafil topic subject
>> ?
> Try:
> 
>:0
> * ^Subject:.*Sildenafil.*
> spam/.   
> 
> Steven Smith,
> sos22@cam.ac.uk.

With this I want to reply both to you,to Peter Edstrom and to dashielljt.
Well first of all many thanks to all of you for interesting answers,however I
think I solved a lot of problems by upgrading my SpamAssassin from 2.20 to 2.55
which includes bayesan filter and a DNS-RBL check against possible spam sources.
I am testing it at present and I cannot yet say "it works perfectly" but at
least I can affirm that it works much better respect the older version.
I'd like to read and learn more about the RBL feature and run some tests on
this to see if it really works.

Many thanks again and best Regards.

Marco

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Re: (F)A "subject" rule for procmail

[Peter Edstrom]

> With this I want to reply both to you,to Peter Edstrom and to dashielljt.
> Well first of all many thanks to all of you for interesting answers,however I
> think I solved a lot of problems by upgrading my SpamAssassin from 2.20 to 2.55
> which includes bayesan filter and a DNS-RBL check against possible spam sources.
> I am testing it at present and I cannot yet say "it works perfectly" but at
> least I can affirm that it works much better respect the older version.
> I'd like to read and learn more about the RBL feature and run some tests on
> this to see if it really works.
> 
> Many thanks again and best Regards.
> 
> Marco

In case you want to learn more about spam in general, there are great
articles on the subject at www.paulgraham.com. "A Plan For Spam"
(http://www.paulgraham.com/spam.html) covers the Bayesian approach. For
information on blacklist, including RBL, you can read the "Filters vs.
Blacklists" article (http://www.paulgraham.com/falsepositives.html).
There are also lots of interesting links at the bottom of these pages -
time is the only thing that stops you for learning all there is to know.
:-)

Just FYI, I've heard many people having problem with SpamAssassin but
are more than satisfied with bmf. Bmf is more lightweight than SA and
known for being easy to configure and so. But the choice if yours, and I
won't propagate for bmf... (ehum..) :-)

Happy spam-hunting!

Best regards,
Peter
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