[otrs] anonymous (public) access to tickiets?

This seems like it would be a FAQ but I can't find it -- is there an easy way to get OTRS to allow anonymous users to submit tickets via the web without the trouble of registering/logging in? Since tickets can be submitted via email, I would presume that should be possible somehow over the web (what happens to tickets submitted via email that don't match a registered user?) Thanks.... -mda