FYI there’s really no way technically that Asana can do what this thread is asking for. Because the email is being sent from the actual Outlook (or Gmail) account of the authenticated user and Asana doesn’t have control of the user’s email domain, Asana can’t send it from someone’s else’s account or email address, as Microsoft (or Google) would not allow that. Otherwise I could send an email from, say, beyonce@gmail.com (just kidding, I don’t know if that’s a valid address or not).
Even if it were possible technically, it would create usability and ethical issues. In terms of usability, it would increase the chances of such an email being marked as spam. Ethically, well, just take my above “beyonce” example! 