I know that I can send email from the same account with a plus address, but how can I do the same from another account or device?

When I try to use a plus address, it ignores it and sends the mail from the real 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.

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