How to force Mail.app to ask for Gmail password? I recently changed my Gmail account's password. The account in Mail.app is offline as expected ("Login Failed"), but there seems no way to input the new password:


There is no password input field in Mail→Preferences→Accounts anymore. The fields Incoming Mail Server and Usernamecontain the right information, but they are greyed out (cannot be changed).
System Preferences→Internet Accounts: "Mail" is checked, but clicking on the "Details…" button only shows two editable fields: Description and Name.


I tried to force Mail.app/Internet accounts Prefs to ask for the new password by deleting the imap.gmail.com entries in Keychain.app, but it did nothing.

Where do I input the new password? Alternatively, how do I force Mail.app to ask for the new password? (A webview panel should popup, where I can input the password.)

Deleting and setting up my gmail account anew in Mail.app is not an option. I'm running OS X 10.11.3. Google 2FA is enabled.
Go to Mail -> Preferences -> Accounts -> Accounts Information Tab and click Outgoing Mail Server drop-down menu. Select 'Edit SMTP Server List'



Click Advanced tab and in the Authentication field select 'Password'. Enter your new password in the according field.



Hope this help.