dovecot - Aug 2012 - Dovecot sieve and duplicate email subjects

Hi,

I'm running a small email server with the help of iRedMail.

I can manage sieve scripts from the Rouncube web interface or manually
inside the user's personal sieve folder.

I have an email account setup to receive automated tasks.

Some of these "alerts" occur too often and they have the same subject
line,
but different senders.

This is the rule I am currently using:

##CODE START##
# rule:[AutoAlerts]
if anyof (

header :matches "Subject" "AutoAlert Type1*",

header :matches "Subject" "AutoAlert Type2*",
header :matches "Subject" "AutoAlert Type3*"

)

{
        fileinto "INBOX.AutoAlerts";
        stop;
}
##CODE END##

I was wondering if it's possible to gracefully handle duplicate subjects
lines (within a given time frame) with sieve filters ?

Ideally, I would like the first email of the day with subject
""AutoAlert
Type1..." to get moved to the subfolder given above. Subsequent
"duplicate"
emails would then go into a "duplicate" subfolder.

Is this possible with sieve filters ? I could not find anything striking me
as obvious while reading the page http://wiki.dovecot.org/LDA/Sieve.

Thanks very much for your input.

Op 8/27/2012 12:40 PM, Benjamin Thomas schreef:
> Hi,
>
> I was wondering if it's possible to gracefully handle duplicate
subjects
> lines (within a given time frame) with sieve filters ?
>
> Ideally, I would like the first email of the day with subject
""AutoAlert
> Type1..." to get moved to the subfolder given above. Subsequent
"duplicate"
> emails would then go into a "duplicate" subfolder.
>
> Is this possible with sieve filters ? I could not find anything striking me
> as obvious while reading the page http://wiki.dovecot.org/LDA/Sieve.
It is currently not possible to maintain some sort of custom state 
information between deliveries, i.e. Sieve invocations. There is the 
unofficial vnd.dovecot.duplicate extension, but that uses the message-id 
exclusively and (currently) cannot be used to track duplicate subjects.

Regards,

Stephan.

On 8/27/2012 12:40 PM, Benjamin Thomas wrote:
> I was wondering if it's possible to gracefully handle duplicate
subjects
> lines (within a given time frame) with sieve filters ?
>
> Ideally, I would like the first email of the day with subject
""AutoAlert
> Type1..." to get moved to the subfolder given above. Subsequent
"duplicate"
> emails would then go into a "duplicate" subfolder.
>
> Is this possible with sieve filters ? I could not find anything striking me
> as obvious while reading the page http://wiki.dovecot.org/LDA/Sieve.
Although the above is still not possible with the standard Sieve 
features, I updated the Dovecot-specific vnd.dovecot.duplicate extension 
with support for the scenario you describe. Basically, I made it much 
more flexible for checking all kinds of string value duplicates and not 
only strictly based on the Message-ID header. Also, the user can now 
directly control the time frame within which duplicates are detected 
(within configurable limits).

http://hg.rename-it.nl/dovecot-2.1-pigeonhole/raw-file/tip/doc/rfc/spec-bosch-sieve-duplicate.txt

It will be included in the next Pigeonhole v0.3 release.

Regards,

Stephan.