Feature Requests item #2939578, was opened at 2010-01-25 18:45
Message generated for change (Comment added) made by sbajic
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Category: None
Group: None
Status: Open
Priority: 5
Private: No
Submitted By: Enrico Scholz (ensc)
Assigned to: Nobody/Anonymous (nobody)
Summary: Create an unique but determined signature

Initial Comment:
I am going to use 'dspam' from within a milter where a message is often checked 
for multiple recipients.  Currently, every recipient will get another signature 
and  message must be cloned for every recipient to add the corresponding 
signature.  Things are even worse when two recipients are resolved to the same 
user by external lookup.  Then, message is processed twice by 'dspam' but user 
is told only one signature.

Hence, it would be nice when a message creates always the same signature. 
Returning a SHA1 based HMAC code (see RFC 2104)  of the message and a 
configurable secret key would be perfect.

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>Comment By: Stevan Bajic (sbajic)
Date: 2010-02-19 20:20

Message:
Why can a DSPAM signature (as it is today) not be added into the headers?
Each user has normally in DSPAM his on storage and training/retraining with
a signature is going to switch tokens for the user.

If you want the signature to stay persistent per message then just use one
DSPAM user to classify/process the message and then deliver from your
Milter to each user, adding the same DSPAM signature to the header and set
your training alias to be executed under the DSPAM user you used when
classifying/processing the message. Or use something like shared groups in
DSPAM.

If I understand you right then your goal is to have just one signature per
mail and you don't care if inside the DSPAM database the data is saved
multiple times (for each user once) as long as the signature stays the
same. Right? Adding something like that could be possible but stuff like
UID in signature would then not work.

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Comment By: Enrico Scholz (ensc)
Date: 2010-02-19 19:20

Message:
I want that users can force dspam to relearn a message.  Relearning
requires knowledge about the signature but because the signature is
different for every recipient it can not be added to the e-mail headers.
Hence, there is no way how users can relearn a message.

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Comment By: Stevan Bajic (sbajic)
Date: 2010-02-19 18:40

Message:
Hallo Enrico,

what issue are you expecting to solve with one unique signature per
message? The current database schema can not attach multiple UID's to one
signature.

-- 
Kind Regards from Switzerland,

Stevan Bajić

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