Cisco Cisco Email Security Appliance X1070 Guía Del Usuario
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Cisco AsyncOS 9.0 for Email User Guide
Chapter 18 Cisco Email Encryption
Inserting Encryption Headers into Messages
Procedure
Step 1
Go to Mail Policies > Outgoing Content Filters.
Step 2
In the Filters section, click Add Filter.
Step 3
In the Conditions section, click Add Condition.
Step 4
Add a condition to filter the messages that you want to encrypt. For example, to encrypt sensitive
material, you might add a condition that identifies messages containing particular words or phrases, such
as “Confidential,” in the subject or body.
material, you might add a condition that identifies messages containing particular words or phrases, such
as “Confidential,” in the subject or body.
Step 5
Click OK.
Step 6
Optionally, click Add Action and select Add Header to insert an encryption header into the messages
to specify an additional encryption setting.
to specify an additional encryption setting.
Step 7
In the Actions section, click Add Action.
Step 8
Select Encrypt on Delivery from the Add Action list.
Step 9
Select whether to always encrypt messages that meet the condition or to only encrypt messages if the
attempt to send it over a TLS connection fails.
attempt to send it over a TLS connection fails.
Step 10
Select the encryption profile to associate with the content filter.
The encryption profile specifies settings about the key server to use, levels of security, formatting of the
message envelope, and other message settings. When you associate an encryption profile with the
content filter, the content filter uses these stored settings to encrypt messages.
message envelope, and other message settings. When you associate an encryption profile with the
content filter, the content filter uses these stored settings to encrypt messages.
Step 11
Enter a subject for the message.
Step 12
Click OK.
Step 13
After you add the encrypt action, click Submit.
Step 14
Commit your changes.
What To Do Next
After you add the content filter, you need to add the filter to an outgoing mail policy. You may want to
enable the content filter on the default policy, or you may choose to apply the filter to a specific mail
policy, depending on your organization’s needs. For information about working with mail policies, see
enable the content filter on the default policy, or you may choose to apply the filter to a specific mail
policy, depending on your organization’s needs. For information about working with mail policies, see
Inserting Encryption Headers into Messages
AsyncOS enables you to add encryption settings to a message by inserting an SMTP header into a
message using either a content filter or a message filter. The encryption header can override the
encryption settings defined in the associated encryption profile, and it can apply specified encryption
features to messages.
message using either a content filter or a message filter. The encryption header can override the
encryption settings defined in the associated encryption profile, and it can apply specified encryption
features to messages.
Note
The Cisco Ironport Encryption appliance must be set up to handle flagged messages.