[horde] horde and imp and spamassassin

[test at inga-und-max.de]

sorry wrong button.

so the 'report this message as spam' link seems not to work. in the 
config i ve
under 'message and spam'
Should we report them via an external program? -> /usr/bin/spamassassin 
-r. and
the 'report this message as spam' link is published. but is this all or should
i do more to make it working.

greets max