On very rare occasions, you may also see emails highlighted in red and marked ‘dangerous’. This means an email signature is invalid and the sender’s identity cannot be verified.
In the majority of cases, this is because a verification key has gone missing for some reason, which means the email has been sent encrypted but cannot be authenticated. (Theoretically, a ‘dangerous’ email could also indicate that someone is trying to impersonate our app.) For example, you could see emails marked as ‘dangerous’ if you have re-verified your identity since receiving the email, but haven’t been through our account recovery process.
You won’t be able to read or reply to emails marked in red.