This article first appeared July 9th, 2012.
If you’re operating two or more email addresses then you’ll want to make sure you can handle both from the same account.
In Gmail, there’s an easy way to do this. Just head to the Settings page, and then click on the “Accounts and Import” tab.
Down the middle of the page, you should see the ability to “add another email address you own”. Once you do that, you can choose to send mail as either one or the other.