OT: procmailrc question

[Ranjan Maitra]

Dear friends,


I am new to making my own procmail recipes and am a bit stumped with
this one.

I use sylfilter as my spam-filtering tool: this tool is available at

http://sylpheed.sraoss.jp/sylfilter/

and does ok. (Since I have been training it for a year, I am not that
keen on switching to spamassassin or bogofilter, etc). However it only
processes within the mailer (sylpheed) currently and that too manually
(a button sequence has to be pressed). There is no automatic processing
in sylpheed.

Being perhaps foolhardy, I have been trying to get syfilter to work
with procmail using my .procmailrc. I was trying to mimic the example
here:

http://www.math.tohoku.ac.jp/~kuroki/keijiban/procmailrc.txt

However, the issue is that I do not quite see how to get this to work
because unlike bogofilter, sylfilter does not add anything to the
header. If it returns a value 0, the mail  is classified as junk,
otherwise it is classified as not spam. These are the return values
(which the user does not see):

Return values:
  0   junk (spam)
  1   clean (non-spam)
  2   uncertain
  127 other errors

My question is: how do i set up my .procmailrc to specify that after
processing, if the value is 0 then it goes to the $HOME/Junk/. section,
otherwise it goes off to be processed in the usual way? In the
bogofilter (and also spamassassin) examples, there is a way to insert a
header in the mail before processing (which is different from
sylfilter's capabilities) so I am a little stumped.

Does anyone have any suggestions on how to handle this? 

Many thanks for your time and help!

Best wishes.
Ranjan



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[Ranjan Maitra]

Hi,

Thanks very much for your help! 

>  > >   sylfilter ~/Mail/inbox/1234
>  > >as the example to classify a message.  
Yes, and the response is something like this:

sylfilter /home/maitra/Mail/inbox/1234
/home/maitra/Mail/inbox/1234: This is a clean mail (prob: 0.000000)


So I believe you want:
>  > >
>  > >   :0 Wc
>  > >   | /usr/local/bin/sylfilter /dev/stdin
>  > >   :0 a
>  > >   $HOME/Mail/Junk/.
>  > >
>  > >because the message will be in the standard input and sylfilter
>  > >wants a filename.
>  > 
>  > Shouldn't this simpler invocation work?
>  > 
>  > :0 Wc
>  > | /usr/local/bin/sylfilter -
>  > :0 a
>  > $HOME/Mail/Junk 
However, neither of these work, in the sense that both yield the same
result as before:

No input file.

Unless the specification above is incomplete, something appears to be
wrong with sylfilter itself. It does work (manually) within sylpheed
itself.

Many thanks again!
Ranjan



>  -- 
>  Cameron Simpson <cs(a)zip.com.au&gt;
>  
>  I had a wierd dream with Ken Thompson in it once.
>          - George Politis <george(a)research.canon.com.au&gt;
>  -- 
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[Cameron Simpson]

On 07Jan2014 22:04, Ranjan Maitra <maitra.mbox.ignored(a)inbox.com&gt; wrote:
>  I am new to making my own procmail recipes and am a bit stumped with
>  this one.
>  
>  I use sylfilter as my spam-filtering tool: this tool is available at
>  http://sylpheed.sraoss.jp/sylfilter/ 
[...]
>  Being perhaps foolhardy, I have been trying to get syfilter to work
>  with procmail using my .procmailrc. I was trying to mimic the example
>  here:
>  http://www.math.tohoku.ac.jp/~kuroki/keijiban/procmailrc.txt
>  
>  However, the issue is that I do not quite see how to get this to work
>  because unlike bogofilter, sylfilter does not add anything to the
>  header. If it returns a value 0, the mail  is classified as junk, 
[...]
>  (which the user does not see):
>  Return values:
>    0   junk (spam) 
As you say, it does not modify the email.

Instead, you want a recipe shaped like this one:

  # Get rid of duplicates
  :0 Whc: .msgid.lock
  | formail -D 16384 .msgid.cache
  :0 a
  /dev/null

This recipe discards duplicate emails, but by replacing the "formail" command
with your "sylfilter" command you can have it discard (or file) junk email.

Example (untested, needed adapting):

  # Get rid of duplicates
  :0 Wc
  | sylfilter ...
  :0 a
  /dev/null

"sylfilter" will receive a copy of the message on its standard
input.  The above recipe should file messages to /dev/null if
sylfilter returns an exit status of 0. Of course, change "/dev/null"
to the name of a folder if you plan to file junk email (for review)
instead of discarding it.

Note that the above recipe is actually two procmail filters: the
first uses sylfilter as the message filer (which is hy it has the
"c" flag; it is "filing" a copy). The filter recipe depends on the
success of the prceeding one, so if sylfilter did not consider the
message to be junk, the second filter will not file the message as
junk.

See "man 5 procmailrc" for details.

Cheers,
-- 
Cameron Simpson <cs(a)zip.com.au&gt;

In the wet the rear is more controllable and easy to use I would agree.
But the front is still where most of your power is. Learn to use the
force correctly Luke! Don't succumb to the high side!!!
        - Erik.Astrup(a)f501.n914.z8.rbbs-net.ORG (Erik Astrup)

[Ranjan Maitra]

Hi,

Thanks for this very much, and also the explanations!

>  Example (untested, needed adapting):
>  
>    # Get rid of duplicates
>    :0 Wc
>    | sylfilter ...
>    :0 a
>    /dev/null 
So, I tried this, but without the .... (I guessed that you were
suggesting this for arguments, is this correct, and the default
versions are just fine for using sylfilter). 

Therefore, I put in this:

:0 Wc
| /usr/local/bin/sylfilter 
:0 a
$HOME/Mail/Junk/.


However, I still get the same error in my procmail.log file:

No input file.

Before reporting on the process for the next step (as it was doing
previously).

What am I doing wrong?

Many thanks and best wishes,
Ranjan

>  
>  "sylfilter" will receive a copy of the message on its standard
>  input.  The above recipe should file messages to /dev/null if
>  sylfilter returns an exit status of 0. Of course, change "/dev/null"
>  to the name of a folder if you plan to file junk email (for review)
>  instead of discarding it.
>  
>  Note that the above recipe is actually two procmail filters: the
>  first uses sylfilter as the message filer (which is hy it has the
>  "c" flag; it is "filing" a copy). The filter recipe depends on the
>  success of the prceeding one, so if sylfilter did not consider the
>  message to be junk, the second filter will not file the message as
>  junk.
>  
>  See "man 5 procmailrc" for details.
>  
>  Cheers,
>  -- 
>  Cameron Simpson <cs(a)zip.com.au&gt;
>  
>  In the wet the rear is more controllable and easy to use I would agree.
>  But the front is still where most of your power is. Learn to use the
>  force correctly Luke! Don't succumb to the high side!!!
>          - Erik.Astrup(a)f501.n914.z8.rbbs-net.ORG (Erik Astrup)
>  -- 
>  users mailing list
>  users(a)lists.fedoraproject.org
>  To unsubscribe or change subscription options:
>  https://admin.fedoraproject.org/mailman/listinfo/users
>  Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct
>  Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
>  Have a question? Ask away: http://ask.fedoraproject.org 

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[Cameron Simpson]

On 07Jan2014 23:14, Ranjan Maitra <maitra.mbox.ignored(a)inbox.com&gt; wrote:
>  > Example (untested, needed adapting):
>  > 
>  >   # Get rid of duplicates
>  >   :0 Wc
>  >   | sylfilter ...
>  >   :0 a
>  >   /dev/null
>  
>  So, I tried this, but without the .... (I guessed that you were
>  suggesting this for arguments, is this correct, and the default
>  versions are just fine for using sylfilter). 
>  
>  Therefore, I put in this:
>  
>  :0 Wc
>  | /usr/local/bin/sylfilter 
>  :0 a
>  $HOME/Mail/Junk/.
>  
>  
>  However, I still get the same error in my procmail.log file:
>  
>  No input file. 
The web page shows:

  sylfilter ~/Mail/inbox/1234

as the example to classify a message. So I believe you want:

  :0 Wc
  | /usr/local/bin/sylfilter /dev/stdin
  :0 a
  $HOME/Mail/Junk/.

because the message will be in the standard input and sylfilter
wants a filename.

Cheers,
-- 
Cameron Simpson <cs(a)zip.com.au&gt;

We've all heard that a million monkeys banging on a million typewriters
will eventually reproduce the works of Shakespeare.  Now, thanks to the
Internet, we know this is not true.
        - Robert Wilensky of the University of California
See also: RFC2795

[Bob Holtzman]

On Wed, Jan 08, 2014 at 03:38:50PM +1100, Cameron Simpson wrote:
>  On 07Jan2014 22:04, Ranjan Maitra
> <maitra.mbox.ignored(a)inbox.com&gt; wrote:
>  > I am new to making my own procmail recipes and am a bit stumped with
>  > this one.
>  > 
>  > I use sylfilter as my spam-filtering tool: this tool is available at
>  > http://sylpheed.sraoss.jp/sylfilter/
>  [...]
>  > Being perhaps foolhardy, I have been trying to get syfilter to work
>  > with procmail using my .procmailrc. I was trying to mimic the example
>  > here:
>  > http://www.math.tohoku.ac.jp/~kuroki/keijiban/procmailrc.txt
>  > 
>  > However, the issue is that I do not quite see how to get this to work
>  > because unlike bogofilter, sylfilter does not add anything to the
>  > header. If it returns a value 0, the mail  is classified as junk,
>  [...]
>  > (which the user does not see):
>  > Return values:
>  >   0   junk (spam)
>  
>  As you say, it does not modify the email.
>  
>  Instead, you want a recipe shaped like this one:
>  
>    # Get rid of duplicates
>    :0 Whc: .msgid.lock
>    | formail -D 16384 .msgid.cache
>    :0 a
>    /dev/null
>  
>  This recipe discards duplicate emails, but by replacing the "formail" command
>  with your "sylfilter" command you can have it discard (or file) junk email.
>  
>  Example (untested, needed adapting):
>  
>    # Get rid of duplicates
>    :0 Wc
>    | sylfilter ...
>    :0 a
>    /dev/null
>   
Dropping messages to /dev/null is dangerous. It's a good way to lose
legit mail that was misclassified. Better to create a spam directory and
put mail classified as spam in there. It's easy to skim thru that and
pick out any mail that was misclassified.

-- 
Bob Holtzman
Your mail is being read by tight lipped 
NSA agents who fail to see humor in Doctor 
Strangelove 
Key ID 8D549279

[Cameron Simpson]

On 08Jan2014 01:14, jdow <jdow(a)earthlink.net&gt; wrote:
>  On 2014/01/07 23:44, Cameron Simpson wrote:
>  >The web page shows:
>  >   sylfilter ~/Mail/inbox/1234
>  >as the example to classify a message. So I believe you want:
>  >
>  >   :0 Wc
>  >   | /usr/local/bin/sylfilter /dev/stdin
>  >   :0 a
>  >   $HOME/Mail/Junk/.
>  >
>  >because the message will be in the standard input and sylfilter
>  >wants a filename.
>  
>  Shouldn't this simpler invocation work?
>  
>  :0 Wc
>  | /usr/local/bin/sylfilter -
>  :0 a
>  $HOME/Mail/Junk 
Perhaps; it is certainly nicer is accepted. I don't have sylfilter
to play with. Either way, sylfilter without a filename of any kind
seems invalid.

Cheers,
-- 
Cameron Simpson <cs(a)zip.com.au&gt;

I had a wierd dream with Ken Thompson in it once.
        - George Politis <george(a)research.canon.com.au&gt;

[jdow]

On 2014/01/07 23:44, Cameron Simpson wrote:
>  On 07Jan2014 23:14, Ranjan Maitra
> <maitra.mbox.ignored(a)inbox.com&gt; wrote:
> >> Example (untested, needed adapting):
> >>
> >>    # Get rid of duplicates
> >>    :0 Wc
> >>    | sylfilter ...
> >>    :0 a
> >>    /dev/null
> >
> > So, I tried this, but without the .... (I guessed that you were
> > suggesting this for arguments, is this correct, and the default
> > versions are just fine for using sylfilter).
> >
> > Therefore, I put in this:
> >
> > :0 Wc
> > | /usr/local/bin/sylfilter
> > :0 a
> > $HOME/Mail/Junk/.
> >
> >
> > However, I still get the same error in my procmail.log file:
> >
> > No input file.
>
>  The web page shows:
>
>     sylfilter ~/Mail/inbox/1234
>
>  as the example to classify a message. So I believe you want:
>
>     :0 Wc
>     | /usr/local/bin/sylfilter /dev/stdin
>     :0 a
>     $HOME/Mail/Junk/.
>
>  because the message will be in the standard input and sylfilter
>  wants a filename.
>
>  Cheers, 

Shouldn't this simpler invocation work?

:0 Wc
| /usr/local/bin/sylfilter -

:0 a
$HOME/Mail/Junk

{^_^}