[Dovecot] Sieve plugin not running on all messages

[Robert Schetterer]

Pascal Volk schrieb:
> On 07/12/2009 03:13 PM Joan Moreau wrote:
>> …
>> {
>>    …
>>    reject "Your message has been considered SPAM by our mail server";
>>    stop;
>> } …
> 
> Please don't do that: <http://www.dontbouncespam.org/>
> 
> Reject Spam in the SMTP session.
> 
> 
> Regards,
> Pascal

really awsome, how many people dont know this simple
issue and wonder by get blacklisted in rbl by backscattering/spamming

to get out of the problem, spam marked messages should
filtered by a global sieve rule to a special junk folder
so that it never will be honored by vacation,
for pop3 users ( which will never see mail in other folders )
mails in the imap spam folder, can be down popped using the virtual
plugin, a better and cheaper way is to reject known spam
on the income smpt level by clamav-milter with sanesecurity antispam
signatures ( but as this might not catch all spam the above sieve
antisapm policy should be used ever ), for other vacation
functions ( over forward script etc ) same issue ( not answer to marked
spam mail ) should be honored in the reply code of the script,
another possibility ist to quarantaine spam mails before getting to
inbox( look amavis-new,clamav-milter )
anyway answering to spam mails should be avoided ever until most of the
senders are faked

-- 
Best Regards

MfG Robert Schetterer

Germany/Munich/Bavaria