Determining Authentication Levels
Applies To: Windows Server 2003, Windows Server 2003 R2, Windows Server 2003 with SP1
There are four binding types that determine the level of authentication used for connections. The option selected affects other options.
| Binding type | Description |
|---|---|
Anonymous |
No authentication is required. Select this option when the server does not require account and password information. |
Plaintext |
This option allows the transmission of account information and passwords in plaintext. When this option is selected, account and password information is required. |
Windows SSPI |
The client and server negotiate to determine which level of authentication is acceptable by both, and use the strongest method available. When this option is selected, account and password information is required. |
Service accounts |
Uses the account information of the user under which the SMTP service is running. This is controlled by Component Services, under Administrative Tools. |