[imp] About user compose

[Enrique]

I'm having trouble letting my users compose messages to addresses not 
containing the trail of my domain. For example I would like that my 
users can write to enrique at flex.uh.cu <mailto:enrique at flex.uh.cu> by 
just typing "enrique" in the To: field and let Horde do the rest.  I'm 
only interested in using this method for local domain addresses. 

I'm using the Horde 3.3.5 Suite ...

Thanks in advance ...