Hi @nyprosell,
To resolve this issue, you need to make sure that the address your using to send your email is tied to an account in your Organisation. For example, if I work at mycompany.com and want to email a task in my Asana organisation, I’ll need to send this email to x@mail.asana.com from marie@mycompany.com (which is the email tied to my Asana account). If the email address you’re using isn’t tied to Asana account member of your Organisation, you will automatically get this message. More info in this article from our Guide!