[Mimedefang] Anti-spam breakthrough from Roaring Penguin

[Dianne Skoll]

On Wed, 5 Apr 2017 17:58:51 -0500
Richard Laager <rlaager at wiktel.com> wrote:

> if (greylisting says to tempfail)
> {
>     # add a header, such that this message will be delivered to the
>     # user's Junk folder
>     # store some data so we can find the message later
>
>     action_tempfail();
> } else {
>     if (we accepted this message before)
>     {
>         # reach out to Dovecot, move the message from Junk to Inbox
>         # (possibly if and only if it is still unread)
>         action_discard();
>     }
> }

That's an interesting idea.  The part about reaching into Dovecot
to move the message is slightly worrying; it implies that the scanning
process has significant privileges.  But yes, it could be a really good idea.

An enhancement would be to automatically train messages in Junk as spam
if they've been there for at least 5 days.

Regards,

Dianne.