Email all students in a course?

Hi,

Is it possible to email all students in a course? I can see the notifications - but it would be useful to be able to let students know things by email, so they don't have to keep checking back.

Also, if the course start date is after the enrollment date, will an email notification about course starting go out? Is there a way to do this?

And what's the best way to request features?

Thanks!
Michelle