How to Send Email from Gmail Plus Address

You need to do the following:

1. Set up the plus address on the original account (even though you won't be using it directly from that interface).
2. Add the account's SMTP information, using the following settings:
   • Email: Your plus address (user+sample@example.com)
   • Username: Either your plus address (user+sample@example.com) or your base address (user@example.com) will work. In fact, it completely ignores anything afer the +, so even an address that wasn't added as a "Send As" in step 1 (user+foo@example.com) will work.
   • Password: The password for user@example.com.

If you don't do the first step, the account isn't permitted to send mail via that plus address and any attempts made at sending via that plus address (user+sample@example.com) will actually be sent from the base address (user@example.com).

Note: the plus address will appear in most headers when the email is sent (e.g. Return-Path, From, Received) but the base address will still be shown in the Sender field. However, most clients should show the From field and hide the Sender field from the user.

Sure, and it's pretty easy too:

1. Go to Gmail settings
2. Go to Accounts and Import Tab
3. Click on Send Mail from another address
4. Enter the Forward account address.
5. The email should send to that address which should forward back to your Gmail.
6. Complete the steps in the email.

When you send a new email you can now change the from address to your forward account.