On page:

http://roundup.sourceforge.net/doc-1.0/customizing.html

it reads:

"automatic registration of users in the e-mail 
gateway... This is the default behaviour in the 
tracker templates that ship with Roundup."

However my new tracker schema.py has the following 
comment:

"# This is disabled by default to stop spam from 
auto-registering users on
# public trackers."

The online docs should be changed to say that 
automatic registration by email is disabled by 
default, but can be enabled to uncommenting the 
appropriate addPermissionToRole in schema.py

Logged In: YES 
user_id=6405

Thanks, fixed.