[horde] iOS Mail Spam support

[Twilek]

Hi,

I have a Horde installation running on debian testing with dovecot as  
a Mailserver. I have got a "Junk" folder and have configured it so  
that mails moved into this folder are learned as Spam. This works  
perfectly if I move mails with imp. I connect to this with my Iphone  
via activesync. If I use the "Mark as spam" option in iOS Mail it  
should simply move it to the junk folder where it is then learned as  
spam right?! Only that it doesn´t. What happens is that iOS mail hangs  
for several seconds, then the inbox is replaced by a weird ID string  
and no mails are showing. I have to go back to the folders listing and  
then back to the inbox which then is completely resynched. The Spam  
mail is not moved at all. Has anybody seen anything similar and an  
idea what goes wrong here?

Regards

Henning