Moving into LDAP for user auth, a few Q's

We've used jamm now for a couple years with great success..  Now I'm 
trying to roll out the office's authentication to use LDAP and having a 
single-signon for mail would be nice but as it stands having the hosts 
in ou=hosting won't allow for me to tie the users 1:1 their email.

I'm reading up on best practices and methodologies, so I haven't really 
flushed out exactly what is up but I'd like to hear from anyone who runs 
their jamm w/ an active ou=people (or something similiar).

Did you add to the people the jamm schemas and add another transport 
lookup in that for postfix?

Is there a way to link people to hosted domains?

Any other viable options available to me?

Thanks for any assistance,

-a


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