Dan upgraded to OS X Catalina last week, and he's starting to get a warning that Google will be able to read, delete and compose email in his account. Leo says that isn't from Google. He suspects that Dan may have an extension installed in Safari that's causing that, or that it could be a standard European GDPR warning message. But even if he approves it, he can revoke the permissions in settings. But first, look at extensions. Safari-Preferences-Extensions.