Use the Security property page to enable security on outbound connections to other systems. Messages transferred from one Microsoft Exchange Server computer to another SMTP host may be encrypted or authenticated.
You can use Simple Authentication and Security Layer (SASL), Secure Sockets Layer (SSL), or Windows NT security on connections to other systems. You can provide the account, domain, and password that is effective for all connections, or you can provide separate security information for each domain you connect to.
Note To ensure the strongest possible encryption over outbound connections, choose SSL encryption or use a Windows NT account with a non-blank password.
|No authentication or encryption||No security enabled.|
|SASL authentication/SSL encryption||Choose SASL/AUTH, SSL encryption, or both.|
SASL/AUTH clear text password
|Uses the AUTH LOGIN ESMTP extension to send the clear text account and password on the outbound connections.|
|SSL encryption||SSL encryption is enabled. The STARTTLS ESMTP extension is used.|
|Windows NT challenge/response authentication and encryption||Enables Windows NT security. Choose this option when the Internet Mail Service is used as a site connector and you want to encrypt data transferred over the Internet.|