Determines authentication type with the server.

A SmtpAuthentications enumeration.  

object.Authentication [= value]

The Authentication Property syntax has these parts:

The settings for value are:

Constant		Value	Description
	AuthNone	1	No authentication required.
	AuthLogin	4	Authentication using LOGIN type.
	AuthPlain	8	Authentication using PLAIN type.
	AuthCramMD5	16	Authentication using CRAM-MD5 type.
	AuthNTLM	32	Authentication using NTLM (SPA) type.
	AuthAuto	255	Tries to determine authentication automatically

Authentication property determines if wodSmtp will try to authenticate with the SMTP server. If you set this value to anything other than AuthNone, then you must also set Login and Password properties with your credentials.

This property must be set before you call Connect or SendMessage methods.

If set to AuthAuto, component will try to determine supported authentication methods. It will check capabilities shown in Connected event, and act on AUTH capabilities presented by the server.