Internet Direct (Indy) Version 9.0.2 Beta
TAuthenticationType
Represents an e-mail authentication type.

TAuthenticationType = (atNone, atLogin);
Description
TAuthenticationType is a type used to specify the authentication type used by an E-Mail server. TAuthenticationType can one of the following values:

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