Cisco Cisco Email Security Appliance C160 Mode D'Emploi

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Cisco IronPort AsyncOS 7.6 for Email Advanced Configuration Guide
OL-25137-01
Chapter 5      Email Authentication
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.
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:
You can also check the verification results against the HELO, MAIL FROM, and PRA identities using 
the following syntax:
Note
You can only use the 
spf-status
 message filter rule to check results against HELO, MAIL FROM, and 
PRA identities. You cannot use the 
spf-status
 content filter rule to check against identities.
You can receive any of the following verification results:
  •
None - no verification can be performed due to the lack of information. 
  •
Pass - the client is authorized to send mail with the given identity.
  •
Neutral - the domain owner does not assert whether the client is authorized to use the given identity.
  •
SoftFail - the domain owner believes the host is not authorized to use the given identity but is not 
willing to make a definitive statement. 
  •
Fail - the client is not authorized to send mail with the given identity. 
  •
TempError - a transient error occurred during verification.
if (spf-status == "Pass")
if (spf-status == "PermError, TempError")
if (spf-status("pra") == "Fail")