Cisco Cisco Email Security Appliance C160 Guía Del Usuario
21-21
User Guide for AsyncOS 9.8 for Cisco Email Security Appliances
Chapter 21 Email Authentication
How to Verify Incoming Messages Using DKIM
Step 5
Commit your changes.
Related Topics
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DKIM Verification and Logging
Lines such as the following are added to the mail logs upon DKIM verification:
Configuring an Action for DKIM Verified Mail
When you verify DKIM mail, an Authentication-Results header is added to the mail, but the mail is
accepted regardless of the authentication result. To configure actions based on these authentication
results, you can create a content filter to perform actions on the DKIM-verified mail. For example, if
DKIM verification fails, you may want configure the mail to be delivered, bounced, dropped, or sent to
a quarantine. To do this, you must configure an action using a content filter.
accepted regardless of the authentication result. To configure actions based on these authentication
results, you can create a content filter to perform actions on the DKIM-verified mail. For example, if
DKIM verification fails, you may want configure the mail to be delivered, bounced, dropped, or sent to
a quarantine. To do this, you must configure an action using a content filter.
Procedure
Step 1
Choose Mail Policies > Incoming Filters.
Step 2
Click Add Filter.
Step 3
In the Conditions section, click Add Condition.
Step 4
Select DKIM Authentication from the list of conditions.
Step 5
Choose a DKIM condition. Select one of the following options:
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Pass. The message passed the authentication tests.
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Neutral. Authentication was not performed.
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Temperror. A recoverable error occurred.
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Permerror. An unrecoverable error occurred.
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Hardfail. The authentication tests failed.
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None. The message was not signed.
Step 6
Select an action to associate with the condition. For example, if the DKIM verification fails, you may
want to notify the recipient and bounce the message. Or, if DKIM verification passes, you may want to
deliver the message immediately without further processing.
want to notify the recipient and bounce the message. Or, if DKIM verification passes, you may want to
deliver the message immediately without further processing.
Step 7
Submit the new content filter.
Step 8
Enable the content filter on the appropriate incoming mail policy.
mail.current:Mon Aug 6 13:35:38 2007 Info: MID 17 DKIM: no signature
mail.current:Mon Aug 6 15:00:37 2007 Info: MID 18 DKIM: verified pass