I'd like to send email as coming from firstname.lastname@example.org, using my email@example.com account. Actually, I'd like to use firstname.lastname@example.org account, (pacbell.net is managed by AT&T for Yahoo).
This article says I can add accounts for that purpose:
However, when I get to the Setting > Accounts page, there does not appear to be an "Add" button.
Is this a premium feature, or, am I missing something?
Any help with this would be appreciated.