I've spread the word for Todoist to some guys I work with and we all upgraded to the premium version today to get the email feature as that is exactly what we have been wanting so we can send tasks to each other.
However, it seems like b/c they have a Todoist account (and thus using their email address) I can't add it as an approved email as I get a "Email already found" error. Is there a way around this?
unfortunately, it seems that there is no way around this, I have forwarded this to the developers. Thank you for pointing it out.
For now, you could try our other product developed for team-oriented work - https://wedoist.com/
we have improved the "Add tasks via email" feature and you can now add email addresses which already have been used for other accounts as well as wildcard domains, for example