Cisco Cisco Email Security Appliance C170 Guia Do Utilizador

Página de 1197
 
21-28
User Guide for AsyncOS 9.7 for Cisco Email Security Appliances
 
Chapter 21      Email Authentication
  Determining the Action to Take for SPF/SIDF Verified Mail
The following example shows a header added for a message that passed the SPF/SIDF check:
Note
The 
spf-status
 and 
spf-passed
 filter rules use the received-SPF header to determine the status of the 
SPF/SIDF verification. 
Determining the Action to Take for SPF/SIDF Verified Mail
When you receive SPF/SIDF verified mail, you may want to take different actions depending on the 
results of the SPF/SIDF verification. You can use the following message and content filter rules to 
determine the status of SPF/SIDF verified mail and perform actions on the messages based on the 
verification results:
spf-status
. This filter rule determines actions based on the SPF/SIDF status. You can enter a 
different action for each valid SPF/SIDF return value.
spf-passed
. This filter rule generalizes the SPF/SIDF results as a Boolean value.
Note
The 
spf-passed
 filter rule is only available in message filters.
You can use the 
spf-status
 rule when you want to address more granular results, and use the 
spf-passed
 rule when you want to create a simple Boolean.
Related Topics
Verification Results
If you use the 
spf-status
 filter rule, you can check against the SPF/SIDF verification results using the 
following syntax:
If you want a single condition to check against multiple status verdicts, you can use the following syntax:
Received-SPF: Pass identity=pra; receiver=box.example.com;
    client-ip=1.2.3.4; envelope-from="alice@fooo.com";
    x-sender="alice@company.com"; x-conformance=sidf_compatible
if (spf-status == "Pass")
if (spf-status == "PermError, TempError")