How do I change a “Reply-to” or “From” address in Entourage (How to edit outgoing headers)?
• Entourage only has one “identity” address associated per account. Typically, this address is treated as both the From address and Reply To address. To change it, select the Tools menu, then select Accounts, double-click on your account, and enter whatever e-mail address you’d like in the e-mail address field. • To set a Reply-To address that is DIFFERENT from the From address, select Tools > Accounts, double-click on your account and click Edit. Click Options and in the Header field, enter Reply-to with a value set to whatever you want your reply to email address to be.