An error occurred while authenticating.

Either the server rejected our request for authentication or the challenge received was malformed.

This is considered a non-fatal error (the connection will not be dropped).

Inherited from SMTPClientError (via ESMTPClientError):

Method __init__
Method __str__ Undocumented
Method __bytes__ Undocumented
Method __str__ 0 Undocumented
API Documentation for Twisted, generated by pydoctor at 2017-09-23 19:45:03.