PROXY PASSWORD

TCP/IP-channel-specific options: PROXY_PASSWORD (string)
The legacy configuration TCP/IP-channel-specific option   has been replaced in Unified Configuration by the    MTA option.

In legacy configuration, in order for the MMP to perform SMTP proxying, this SMTP server option must be set to the same "secret" password as the MMP&#x27;s    value. If the   TCP/IP-channel-specific option is not set,  client attempts to use the XPEHLO command will receive an error: 503 5.5.0 Proxy support is not enabled. If the  TCP/IP-channel-specific  option is set but its value does not match the  MMP&#x27;s value, client attempts to use the XPEHLO command will receive an  error: 535 5.7.8 SMTP proxy authentication check failed.

See also:
 * smtpproxypassword Option
 * TCPIP-channel-specific options