US"Negotiation failed for proxy configured host",
US"Authenticator 'other' failure",
US"target not supporting SMTPUTF8",
US"Negotiation failed for proxy configured host",
US"Authenticator 'other' failure",
US"target not supporting SMTPUTF8",
US"Not time for routing",
US"Not time for local delivery",
US"Not time for routing",
US"Not time for local delivery",