Authpassword, authusername, externalidentity Channel Options

Credentials for client SMTP AUTH use channel options:,  ,
The,  , and   channel options  may only be set (are only valid) in Unified Configuration; they replace the (legacy configuration only)  TCP/IP-channel-specific options AUTH_PASSWORD, AUTH_USERNAME, and EXTERNAL_IDENTITY.

SASL authentication will be attempted if either the   or           channel option is set, with  success required for message transmission if    is set.

The PLAIN and EXTERNAL SASL mechanisms are currently supported. The  and     channel options provide the credentials for the PLAIN mechanism and  the   channel option provides the identity  string for SASL EXTERNAL. (  can be set to the empty  string to enable SASL EXTERNAL without an identity string.)

See the Base certmap options for general configuration of certificate mapping, as needed for EXTERNAL authentication via client certificates.

See also:
 * TLS and SASL channel options