Cisco Cisco Email Security Appliance X1070 Guía Del Usuario
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User Guide for AsyncOS 10.0 for Cisco Email Security Appliances
Chapter 22 Email Authentication
How to Verify Incoming Messages Using DKIM
Step 3
Depending on your requirements, configure the following fields:
•
DKIM Signing of System Generated Messages
•
Use From header for DKIM Signing
Note
If you are not using From header for DKIM signing or if a valid From header is missing,
Sender header will be used. For DMARC verification of DKIM signed messages, you must
use the From header during DKIM signing.
Sender header will be used. For DMARC verification of DKIM signed messages, you must
use the From header during DKIM signing.
Step 4
Submit and commit your changes.
Domain Keys and Logging
Lines such as the following are added to the mail logs upon DomainKeys signing:
Lines such as these are added to the mail logs upon DKIM signing:
How to Verify Incoming Messages Using DKIM
Tue Aug 28 15:29:30 2007 Info: MID 371 DomainKeys: signing with dk-profile - matches
user123@example.com
Tue Aug 28 15:34:15 2007 Info: MID 373 DomainKeys: cannot sign - no profile matches
user12@example.com
Tue Aug 28 15:29:54 2007 Info: MID 372 DKIM: signing with dkim-profile - matches
user@example.com
Tue Aug 28 15:34:15 2007 Info: MID 373 DKIM: cannot sign - no profile matches
user2@example.com
Table 22-1
How to Verify Incoming Messages Using DKIM
Do This
More Info
Step 1
Create a profile for verifying messages using
DKIM.
DKIM.
.
Step 2
(Optional) Create a custom mail flow policy to
use for verifying incoming messages using
DKIM.
use for verifying incoming messages using
DKIM.
Step 3
Configure your mail flow policies to verify
incoming messages using DKIM.
incoming messages using DKIM.
Step 4
Define the action that the Email Security
appliance takes on verified messages.
appliance takes on verified messages.
Step 5
Associate the action with groups of specific
senders or recipients.
senders or recipients.