No. Currently, we're only supporting Google accounts for sign-in. We decided to use this method to simplify the registration process to be a one click process, and because we don't want to have security/password storing responsibility.
You might say, well, I don't have any Google Account!
Simple! Just go to Google and create a new one. It's free! Once you have it, click the button below to Sign-in at MoonMail.
You don't need to have any Gmail address for creating a Google Account, you can create a Google Account with your actual email address, like a corporate one or outlook.com