Every time my Google Calendar sends me a notification message about an upcoming calendar entry, Thunderbird warns me the message may be scam. I see no way to disable this. The Google Calendar email address is in my Personal address book. The Options button has two possible choices: "Ignore warning for this message" and "Edit scam detection options". Or I could just click the X to close the warning bar.

If I choose to ignore the warning, I have to do this for every Google Calendar notification I get. The "Edit" option brings me to the options window, Security tab; this has only one option to uncheck the "Tell me if the message I'm reading is a suspected email scam". I see no way to have Thunderbird treat Google Calendar notifications as safe yet continue to warn me about other messages. There should be a way to whitelist email addresses.