Deep Discovery Email Inspector verifies DomainKeys Identified Mail (DKIM) signatures in incoming email messages and applies actions on messages that fail to pass signature verification. If a message's DKIM signature passes verification, the message will continue to the next step in the message delivery process.
- Go to Administration > Sender Filtering/Authentication > DKIM Authentication.
- Select Enable DomainKeys Identified Mail (DKIM) authentication.
- To add verification result into the message header, select Insert X-Header into email messages.
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Select the maximum number of signatures to verify in a message.
Note:
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If a message contains more than the maximum number of signatures you select, Deep Discovery Email Inspector terminates the DKIM authentication process for the message.
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Selecting a larger number of signatures to verify may require more processing load.
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Specify the sender domains to verify. Select All to
verify DKIM signatures in messages from all sender domains; otherwise, select
Specify sender domains and complete the following
steps to add sender domains to the verification list.
- Type a domain.
- Click Add.
Note:To remove a sender domain from the list, select the entry and click Delete.
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Specify the action to perform based on the verification
result.
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Bypass: Select this option to allow Deep Discovery Email Inspector to continue processing of the message.
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Block temporarily: Select this option to temporarily block the message. The sender can send the same message to Deep Discovery Email Inspector to perform the verification again.
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Block permanently: Select this option to permanently block the message. When a new message is received from the sender, Deep Discovery Email Inspector performs the verification again.
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- Click Save.