[horde] Horde webmail spam report and spam assassin

[Alejandro Lengua]

Horde webmail (IMP) has a spam reporting feature, however it
is a bit useless.

Why?
Because it sends the email (without headers) to an email
address (the spam admin). This way is very difficult to
feed the spam mail into spam detection software.

I wonder if somebody has done anything to make it work
with  the SA-Learn feature of Spam Assassin.