[rt-users] RT Permissions Problem

[Gonzalo Servat]

Hi All,

I'm using RT 3.0.0. I have a ticket open with it's requestor set to 
'foo at bar.com'. Now, on one correspondence I decide to Cc someone who does 
NOT exist on the helpdesk. This someone decides to reply to the ticket, and 
RT sends me an email with:

RT could not load a valid user, and RT's configuration does not allow
for the creation of a new user for your email.

What permissions am I missing?

As a feature suggestion, would be nice if RT could give a little bit more 
info about this error, such as who sent the mail, to whom, what subject, 
etc. :)

Thanks in advance.

Best regards,
Gonzalo