This ruleset allows these ESMTP authentication types: DIGEST- MD5, CRAM-MD5, PLAIN, LOGIN, LOGIN (old style), NTLM, and GSSAPI. The default rule denies all other authentication types. The RFC that tells about the SMTP authentication extension is RFC 2554. You can add, delete, or modify rules.
If you modified a predefined proxy action, when you save the changes you are prompted to clone (copy) your settings to a new action.
For more information on predefined proxy actions, see About Proxy Actions.
About the SMTP-Proxy