Re: Checking from an external file?

Milan,


On 2025-05-19 19:27, Milan Obuch wrote:
> On Mon, 19 May 2025 18:55:43 +1000
> Philip Rhoades via Courier-maildrop
> <[email protected]> wrote:
> 
>> Milan,
>> 
>> Progress! - see below . .
> 
> [ snip ]
> 
>> No errors now . . and mail is delivered but only to the standard
>> maildir:
>> 
>> I tried these:
>> 
>>    Luxury Watch #13
>>    Subject: Luxury Watch #13
>>    "Subject: Luxury Watch #13" subject
>> 
>> in .list but I still get:
>> 
>>    MAILDIR=""
>> 
>> I guess I am getting the syntax wrong in the .list file for the key
>> value lookup?
>> 
> 
> Is there something in maillog connected to delivery process of a given
> mail? For mail test done by direct maildrop call from shell, probably
> something is printed to stdout...


Yes, I have output in:

   ~/.getmail/.maildrop.log

and I keep the output of the mailfilter stuff directly in:

   Maildir/maildrop.logs


> Back to your original question - whether it is possible to use file for
> a list of values to do some lookup, I gave an example how it could be
> done. You did not state purpose of doing so, so maybe my example was
> not exactly suitable for your use case, which I did not wrote what
> purpose it servers.


Yes, I didn't quite realise what your own code was attempting to do - 
clearer now . .


> So to fix that, my example was how could a mail be delivered in a
> folder designated for a maling list posts in a general way, without
> necesity to edit a .mailfilter on every mailing list addition or
> deletion to the list of mailing lists I am subscribed to, and I wish to
> store the communacation in a dedicated folder.


Right.


> Mailing list software usually identified posts distributed by list by
> adding some mail headers in process of delivering mails. That was
> List-Id in my case, the (probably) most common one.


Right.


> What you are trying to do, is classify a subject of mail by presence of
> some strings, and then, probably do some alternate folder delivery


Correct.


> (I
> do not recommend drop mail to floor this way instead, as you can loose
> good non spam mail without possibility to fix that short of letting
> sender know of necessity to repost a message with different subject).


No, I wouldn't just drop mails - I have a collection of about 10k spam 
mails (which keeps getting bigger) that I have kept that I thought might 
be useful sometime - like now!


>> Yes, I will look at that - I think once I have he DB working it
>> should greatly simplify what I do.  Also, yes, I would prefer to use
>> regexes instead of exact matches for the Subjects . .
>> 
> 
> That's what 'lookup' function does - so getting an example from man
> page and adjusting it a bit to your situation (or my understanding of
> it) I would test following snippet:
> 
>  if (/^Subject:\s*(.*)/ && lookup($MATCH1,'badsubject'))
>   {exception {to "$HOME/Maildir/.somefolder"
>              }
>   }
> 
> In file 'badsubject' you place a list of regexps, one per line, to test
> your subject against, if a match is found, mail should be placed into
> 'somefolder' located just below Inbox in your mailbox (maildir, to be
> exact), provided such folder does exist.
> 
> I think this matches a bit better your intention than my original
> example, if not, more material for testing (and thinking about it, this
> part is important) is provided.


OK, this appears to be working! (more testing and particularly with lots 
of lines in .badsubject):


if (/^Subject: *(.*)/)
{
     if (gdbmopen('.badsubject.db','R'))
         echo 'gdbmopen error R1'
     else
     {
         if (/^Subject:\s*(.*)/ && lookup($MATCH1,'.badsubject'))
         {exception {to "$HOME/Maildir/.INBOX.1"
                    }
         }
     }
}

if (gdbmopen('.badsubject.db','N'))
     echo 'gdbmopen error N1'
else
{
     foreach (`cat $HOME/.badsubject`) =~ /\S+\s+\S+/
     {
         $MATCH =~ /(\S+)\s+(\S+)/;
         if (gdbmstore($MATCH1,$MATCH2))
             echo "gdbm $MATCH1 => $MATCH2 problem!"
     }
     gdbmclose
}


Thanks for all your help - it has been greatly appreciated!

Regards,

Phil.
-- 
Philip Rhoades

PO Box 896
Cowra  NSW  2794
Australia
E-mail:  [email protected]