Re: Checking from an external file?

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Milan,


On 2025-05-18 18:44, Milan Obuch wrote:
> Maybe a bit more explanation could help you...
> 
>> >   if (/^List-Id: *(.*)/)
> 
> This tests for existence of List-Id mail header, commonly used by
> mailing list software to mark mail as being sent via mailing list, and
> record which one it was.
> 
> For your use case, substitute ^List-Id: with ^Subject:
> 
>> >    {ListId = $MATCH1
> 
> This way, ListId value is being set to List-Id header value, so it can
> be processed below.
> 
>> >     if ($ListId =~ /.*\<(.*)\>/)
> 
> List-Id mail header commonly contains some free text human readable
> description and list identifier, the later enclosed in angle brackets
> (<>).
> 
>> >      ListId = $MATCH1
> 
> Extract true list identifier.
> 
>> >     if (gdbmopen('.list.db','R'))
> 
> Open db file for reading.
> 
>> >      echo 'gdbmopen error R1'
> 
> Report problem in log.
> 
>> >     else
>> >      {MAILDIR = gdbmfetch($ListId)
> 
> Extract desired folder for given list identifier.
> 
>> >       gdbmclose
> 
> Close database.
> 
>> >       if ($MAILDIR)
> 
> Folder for given identifier found, use it below.
> 
>> >        {exception {to "$HOME/Maildir/$MAILDIR/"
> 
> Put mail in designated folder if it exist, use default folder in case
> of any error, so the mail does not get lost.
> 
> I hope my detailed notes (maybe too detailed for you, but I have no
> idea about level of your experience, so I went rather to detail here)
> help you in your experiments.
> 
>> Right - I am a bit anxious about a db - I guess I preferred just text
>> files for simplicity etc but this might work . .
>> 
> 
> I think the same. When I wrote those recipes, years ago, I do no longer
> remember how much years, I found the database functions in maildrop are
> simpler actually, and probably more efficient than sequential tests.


Right.


> Think of it as some kind of cache - file parsing occurs once, when file
> is changed, and then quick lookup is done on mail delivery.


Right.


> Actually, if you need just some string presence test for your use case,
> there is lookup function in maildrop, which could be just the right one
> for you, but my first response was based on what I actually use, and my
> use case requires not only presence test, but some associated value for
> the string found as well.


OK, first steps for me - maybe I can look at that later . .


>> > I have 101 lines in my .list file, so while its handling looks
>> > somewhat complex, it is simpler to maintain long-term... and when I
>> > created this, I was willing to spend some time to learn things and
>> > automatize mail processing when possible.
>> 
>> 
>> Yes, I am too - however one reason for looking into this idea was
>> because when I added 2,534 lines to my .mailfilter file, I got a core
>> dump . . even with verbose = 5 I can't see why . . I thought looking
>> up a separate file might help sort out problems.
>> 
> 
> Ah, yes, using some kind of lookup for grouping similar case greatly
> reduces complexity of maildrop recipe, which in turn makes it easier to
> look for some syntax problem or anything weird you may have 
> encountered.


OK, I have:

- Created a new usr "tst"

- Copied .mailfilter from "phr" and deleted all of phr's custom stuff

- Successfully mailed from GMail to tst and done local maildrop emails 
to tst.

However, after having added your code (and admittedly still not been 
100% sure of what I am doing) . . for the attached new .mailfilter file 
(I have changed the ownership to phr so I can upload it) I am getting:

[tst@pricom ~]$ maildrop ~tst/.mailfilter < ~tst/Maildir/tmd_00.txt # 
which usually works
/home/tst/.mailfilter(151): Syntax error.

So I must have syntax errors or I am still missing stuff . .

Regards,

Phil.
-- 
Philip Rhoades

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