[horde] Unclear error message - any hints?

[Jens-U. Mozdzen]

Hi *,

I have three "external accounts" in my Horde webmail interface, one of  
them generates an "interesting" error message.

I have logged in to that account via Horde (as well as to the other  
two) and see the corresponding "inbox" folder in the navigation tree  
on the left of the IMP window. When clicking that folder entry, the  
folder is opened in the right pane and I see a red popup stating  
"contains hyphen at position three and four" (original message is  
German: "Enthält Bindestrich an der dritten und vierten Stelle").  
Horde's log does not list any messages when this happens.

The clicked folder is empty, as are the other two folders (inboxes of  
the other two accounts). Checking these other two folders works  
without any error message.

When there are messages in that folder, I can use them without problem  
(selecting that folder may cause the same error message, but I simply  
cannot remember for sure).

All three external accounts are for separate users, both the  
troublesome and one of the normally working accounts go to the same  
provider, they just differ by the user name (which is all lowercase  
letters, in both cases).

Any idea what component might be delivering that error message - and why?

Regards,
Jens