Cisco Cisco Email Security Appliance C370D ユーザーガイド
Chapter 4 Email Authentication
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Cisco IronPort AsyncOS 7.1 for Email Advanced Configuration Guide
OL-22164-02
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
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.
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:
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