To link WordPress email to Gmail, I suggest you use the 4n6 Email Backup App. The application allows you to easily integrate your WordPress email account with Gmail, so you can access all your emails in a single location. With the 4n6 Email Backup App, you can easily set up your WordPress email account, choose Gmail as the destination, and the application will do the rest. The application is compatible with multiple email services, such as IMAP and POP3, thereby working with most WordPress email configurations.