[Dovecot] antispam plugin and MUA-Junk folders

[Steffen Kaiser]

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Hello,

I have a configuration problem, that I ignored till now.

Many MUAs tag SPAM themselves and move SPAM to a junk folder (Thunderbird 
uses "Junk").

It is said to not automatically train these mails, but let have an human 
revise them.

Currently, I have configured those folders as "trash" folders for 
antispam, which means that those messages are essentially lost, because a 
move into a spam folder will not train them. -> The current antispam 
plugin ignores moves in and out of trash folders completely. I wonder why 
the move trash -> SPAM is ignored?

If I configure those junk folders as "unsure" in antispam, the situation 
can happen, that an user selects a spam folder, the MUA identifies junk 
and moves the messages into its Junk folder. Current implementation would 
train this move as HAM.

How about the following:

1) copy from * into trash or unsure -> not train
2) copy from !spam into spam -> train as SPAM
4) copy from spam or unsure into !(trash or unsure or spam) -> train as 
HAM
6) else -> not train

Bye,

- -- 
Steffen Kaiser
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