Rt-3.0.0 https-installation and mailgate and ExternalAuth


in another thread I stated my problems with the new mailgate needing a URL
and not supporting https.

What is if I am running rt with ExternalAuth?
How will rt-mailgate do authentication to apache?
Or ist there only one directory in NoAuth rt-mailgate has to see and use?

if the latter is true I could set up my apache to serve only this directory
via http without authentication which would solve bith of mine problems.