Cisco Cisco Email Security Appliance C190 Technical References

Optionally, you can configure the appliance to return a third-party response from the SPF publisher 
domain if the REJECT action is taken for Neutral, SoftFail, or Fail verification result. By default, the 
appliance returns the following response:

   

 550-#5.7.1 SPF unauthorized mail is prohibited.

    550-The domain example.com explains:

    550 <Response text from SPF domain publisher>

To enable these SPF/SIDF settings, use the 

listenerconfig -> edit

 subcommand and select a listener. 

Then use the 

hostaccess -> default

 subcommand to edit the Host Access Table’s default settings. 

Answer yes to the following prompts to configure the SPF controls:

The following SPF control settings are available for the Host Access Table:

Would you like to change SPF/SIDF settings?  [N]> yes

Would you like to perform SPF/SIDF Verification?  [Y]> yes

SPF Only

whether to perform HELO identity check

SMTP actions taken based on the results of 
the following identity checks:

HELO identity (if enabled)

MAIL FROM Identity

SMTP response code and text returned for the 
REJECT action

verification time out (in seconds)