Como consigo adicionar um e-mail no todoist?
if you want to add tasks via email, please click on the small envelope icon in the top-right corner of a task list. You will find and email address there (which is the unique address of the particular project) along with detailed instructions on how to attach labels and assign due dates using this method.
Note - if you want to add tasks using a different email address then the one you've signed up with, you have to add it at the bottom of the window in which you find the project's email address.
If you want to link emails as tasks, though, please watch this short video of how it works: