dovecot - Jan 2010 - Conditionally use a sieve script with deliver?

I found a post in this list [0], which says sieve scripts can be used to 
deliver mail as read. However, can it be done somehow conditionally, I mean, 
with a direct or indirect switch for deliver?
For a nonexistent example, it would be simply 
< | deliver -m path/to/maildir -r > or maybe an environment variable could
be
exported to deliver sieve and checked there?

(Still not sure if sieve can replace maildrop in my case, however, using it 
with dovecot creates various problems with interoperability; but perhaps I can 
just add those imap4flags like "\\seen" myself to the message with
maildrop and
avoid mess with sieve at all?)

[0] http://www.dovecot.org/list/dovecot/2008-July/032294.html
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On 2010-01-20 21:11:59 +0000, K?rlis Repsons wrote:
> I found a post in this list [0], which says sieve scripts can be used to 
> deliver mail as read. However, can it be done somehow conditionally, I
mean,
> with a direct or indirect switch for deliver?
> For a nonexistent example, it would be simply 
> < | deliver -m path/to/maildir -r > or maybe an environment variable
could be
> exported to deliver sieve and checked there?
> 
> (Still not sure if sieve can replace maildrop in my case, however, using it
> with dovecot creates various problems with interoperability; but perhaps I
can
> just add those imap4flags like "\\seen" myself to the message
with maildrop and
> avoid mess with sieve at all?)
> 
> [0] http://www.dovecot.org/list/dovecot/2008-July/032294.html
just curious: what stops you from migrating your maildrop rules to
sieve?

    darix

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