Learn how to connect your Gmail account to have emails sent from them.
Under your library's Email Settings, you will be able to connect your Gmail account using the Connect My Gmail Account button.
A browser window will open asking for your Gmail login. Proceed by entering your email and password.
A new screen appears describing the permissions that Kotobee will receive. Check the "Send email on your behalf" box, and hit Continue.
Once you complete those steps, you will find the Connect My Gmail Account button replaced with the following:
To send emails from a non-Gmail address, please contact support.