Internet Direct (Indy) Version 9.0.1 Beta
TIdSMTP.AuthenticationType
Authentication type required to connect to the SMTP host.

property AuthenticationType: TAuthenticationType;
Description
AuthenticationType is a TAuthenticationType property that specifies the authentication type used by an E-Mail server. AuthenticationType can contain one of the following values:

You can find the authentication mechanisms supported on an E-Mail server by using AuthSchemesSupported.