[horde] Horde -> Imp + Multiple domains = Problem

[Bruno Ribeiro da Silva]

Hi All,

I'm having a problem with horde authentication using multiple domains, 
after I log into horde, horde sends the authetication to imp to be used, 
but for example, I log with test at example.com but horde sends only the 
user test to imp, without @example.com, how can I adjust horde to send 
the complete mail address to imp authentication? It's necessary for use 
with multiple domains.

Thanks and sorry for my english.
Bruno Ribeiro da Silva