Cisco Cisco Email Security Appliance C390 Mode D'Emploi

The SMTP response is a code number and message that the appliance returns 
when it rejects a message based on the SPF/SIDF verification result. The 
TempError result returns a different SMTP response from the other verification 
results. For TempError, the default response code is 

451

 and the default message 

text is 

#4.4.3 Temporary error occurred during SPF verification

. For all 

other verification results, the default response code is 

550

 and the default message 

text is 

#5.7.1 SPF unauthorized mail is prohibited

. You can specify your 

own response code and message text for TempError and the other verification 
results. 

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:

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

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