If you are sending an email on behalf of someone, can use the Have Replies Sent To field in Message Options to have the replies go to the original sender.
- After composing the message, click the Direct Replies to button on the Options tab.
- Click Select to find a name in the address book, or just type the email address in the Have replies sent to field. The message will appear to the recipient that it came from you, but the replies should be sent to the address you entered.
- Click Close to save the settings.
- Click Send to send the message.