Hi @Robert.skelton,
This capability isn’t available within Asana itself.
I will likely add the ability to send email as a Flowsana feature in the future; it’s not in the current beta.
You could do this using Zapier. For sending the email, you’d either have to use their own email sending capability in which the email comes from noreply@zapiermail.com, or you’d need to set up an account at one of the transactional mail services they support; here is a list of those.