Security of httpS:// on an Open Unsecure Wifi

https encryption on a login page will only encrypt the login page and any information you use to log in to that site. In theory since one would need the login credentials to read your email, this is "enough."

However, passing login credentials in an unprotected wifi network is generally a bad practice in the first place, https or not.

 

yes, but realistically, there is no way for someone to get your credentials from a network, open or not, if you are using HTTPS.

Without getting into too much detail, the security process uses key pairs to encrypt traffic, meaning no one other than the intended recipient can read the data that is passed between you and the server.