Authentication states
Representative of the six authentication states, which occur only when sending through a smarthost.
In detail
The family in full: authplain, authlogin and authcram for the three mechanisms, authusername and authpassword for the steps within them, and authresponse for the server's final verdict. Each has its own timeout in the capacity profile. All six mean the same thing for analytics: we could not log in to the server we were relaying through. That is a configuration failure on our side, never a statement about the recipient, and it must be kept out of bounce rates entirely. On a node that delivers directly — which is all of ours — none of these can occur.