The popup send email dialog asks for a From Address. And if the sent from address is different, the email is composed with a "on behalf of". Unfortunately this is causing blocked emails, in particular when the From Address is from AOL and Yahoo.
AOL and Yahoo have implemented dmarc which prevents sending on behalf of emails.
So ideally, the From address collected on the input page would be the reply to address (not on behalf of). Is there some way to resolve this/override it? or is an improvement in the works?