duplicate suppression, sieve, loops, redirect and lost email

[Ken Murchison]

Quoting "Kevin P. Fleming" <kpfleming at cox.net>:

> Rob Siemborski wrote:
> > On Fri, 30 Aug 2002, Ken Murchison wrote:
> > 
> > 
> >>It already does keep track of msgid/rcpt pairs for redirect, but I still
> >>don't see how this helps us.  How does the script know that it
> >>redirected back to itself?  Perhaps adding the server's hostname to the
> >>X-Sieve header would help us determine that this message is coming back
> >>to us via a loop.
> > 
> > 
> > I don't think this is good enough, since I could have:
> > 
> > redirect "leg+cyrus at andrew.cmu.edu"
> > 
> > in my sieve script, which (if only the server name was included) would
> > then get dropped (or bounced or whatever).
> > 
> > However, putting the expected rcpt-to value in X-Sieve might be
> > interesting, since then we have a user and a host name that has already
> > seen the message.
> > 
> > -Rob
> > 
> > -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
> > Rob Siemborski * Andrew Systems Group * Cyert Hall 207 * 412-268-7456
> > Research Systems Programmer * /usr/contributed Gatekeeper
> > 
> > 
> 
> I'm not sure I see the problem here...
> 
> What I'm suggesting is a lot simpler: when a message is redirected by 
> the sieve script, it's message id is stored.
> 
> If, during a subsequent invocation of the script, the same message id is 
> requested to be redirected again, the redirection is ignored (or turned 
> into a keep).

All of this is already in place and works: a msg-id is only redirected to a 
given rcpt once.  The problem that started this thread, is that some users 
redirect a message to themselves in an attempt to save a copy, rather than 
doing a keep.  In doing so, they never get a copy.

I think that the existing behavior is correct and what is expected when used 
correctly.  The problem being discussed is an edge case where IMO Sieve is 
being misused.

-- 
Kenneth Murchison     Oceana Matrix Ltd.
Software Engineer     21 Princeton Place
716-662-8973 x26      Orchard Park, NY 14127
--PGP Public Key--    http://www.oceana.com/~ken/ksm.pgp