Alumni Using Personal Gmail Accounts
This account uses your NetID@cornell.edu address.
Some people have asked whether they can use a personal Gmail account (with an address like firstname.lastname@example.org) but have the messages appear to come from their Cornell address.
The short answer is no. This is known as spoofing and it's a bad thing, even if intended harmlessly. Various email systems look for evidence of spoofing and may block messages and the accounts sending them. Neither Google nor IT@Cornell support this practice.
To summarize: if you want to send email that looks like a Cornell account, send it from your Cornell account.