In the old Eudora, it was possible to send emails from different email addresses. IN my case, I have my primary address, but I also would like to 'send' or reply to emails that have routed to my primary address with another email address. For example, 'sales' type emails are routed to my primary email for filtering and replies, but I'd like to respond to those inquiries with 'sales@xyz.com' as the sending address instead of 'me@xyz.com'.