Can't access premium
I have premium but can't get to the e-mail address to all tasks.
If you're referring to the "Email tasks to this project" feature, it's accessible by right-clicking any project.
Please note that if you want to use other email addresses to send your tasks via email, you must add them to the list at the bottom of the "Email tasks to this project" window.
If that's not the case, please clarify what issue exactly are you experiencing with this feature, do you see any error messages etc.