Re: [sieve] Duplicate test

[Alexey Melnikov <[e-mail]>]

On 14/01/2013 12:23, Stephan Bosch wrote:
> Hi,
>
> A while back I built a non-standard Sieve extension for detecting 
> duplicate message deliveries, e.g. as seen when people cross-post over 
> multiple mailing lists. This functionality is very similar to what 
> could be achieved with Procmail using formail -D. Someone requested 
> this at some point and in a moment of boredom I built the initial 
> implementation. Last year I extended it a bit and I made it more 
> generic. I never intended for this to be standardized, but - now that 
> I look at it again - I think this may yet be of some interest to other 
> Sieve implementers as well.
>
> I make a habit of documenting my custom Sieve extensions in a familiar 
> RFC-like manner:
>
> http://hg.rename-it.nl/dovecot-2.1-pigeonhole/raw-file/tip/doc/rfc/spec-bosch-sieve-duplicate.txt 
>
>
> What do you think? Would you be interested in having functionality 
> like this standardized? Should I submit this as a draft?
I think this would be worth standardizing. Some comments on the document:

1). I think the text motivating existence of this extension needs a bit 
of restructuring: it first introduces a very generic concept of matching 
and only later it talks about duplicate suppression. I would reverse 
that: describe some specific use cases first, then generalize.

2). I found that "the side effect of the test takes force at the end of 
a successful script execution" to be odd/awkward. Maybe we can have an 
explicit action? Or maybe leaving this as is is Ok... Need to think a 
bit more about that.

Otherwise this looks quite good to me.

Best Regards,
Alexey