dovecot - Nov 2014 - Prevent a message from be deleted but not from be moved

Is it possible to prevent a message from be deleted but not from be moved
to another mailbox via ACL?

I need this because I'm using antispam plugin with the mailtrain backend.
It calls a script every time a message is moved to/from a monitored spam
mailbox. But, if the user deletes a message from the spam folder, the
script is executed with the option to train the antispam to consider that
excluded message as a non spam.

So, what I need is to prevent the user from delete a message from the spam
mailbox, but I want to permit the user to move a menssage from the spam
mailbox to another mailbox.



-- 
Att.
Bruno Galindro da Costa

Am 21.11.2014 um 14:00 schrieb Bruno Galindro da Costa:
> Is it possible to prevent a message from be deleted but not from be moved
> to another mailbox via ACL?
>
> I need this because I'm using antispam plugin with the mailtrain
backend.
> It calls a script every time a message is moved to/from a monitored spam
> mailbox. But, if the user deletes a message from the spam folder, the
> script is executed with the option to train the antispam to consider that
> excluded message as a non spam.
>
> So, what I need is to prevent the user from delete a message from the spam
> mailbox, but I want to permit the user to move a menssage from the spam
> mailbox to another mailbox
simply: no

many if not most mail-clients in case of move issue two commands:

* copy to new folder
* delete from old folder

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On 21-11-14 14:00, Bruno Galindro da Costa wrote:
> Is it possible to prevent a message from be deleted but not from be
> moved to another mailbox via ACL?
> 
> I need this because I'm using antispam plugin with the mailtrain
> backend. It calls a script every time a message is moved to/from a
> monitored spam mailbox. But, if the user deletes a message from the
> spam folder, the script is executed with the option to train the
> antispam to consider that excluded message as a non spam.
> 
Isn't the antispam plugin setting that defines the Trash folder
exactly there to mitigate this behaviour? I.e.:

- - move from anywhere to spam folder => train as spam
- - move from spam to trash => don't train
- - move from spam to anywhere else => train as ham

Regards,
	Tom
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