This works for me in PurelyMail. This behavior is configurable: https://i.vgy.me/oprwJz.png https://i.vgy.me/oprwJz.png IIRC it may also be necessary to add th

This works for me in PurelyMail. This behavior is configurable: https://i.vgy.me/oprwJz.png https://i.vgy.me/oprwJz.png IIRC it may also be necessary to add the desired sending address as an "identity" in the webmail config of the real mailbox. Pretty sure this will be a feature more or less anywhere