Cisco Cisco Email Security Appliance X1050 Guía Del Usuario
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Cisco AsyncOS 8.0.1 for Email User Guide
Chapter 16 Cisco Email Encryption
Determining Which Messages to Encrypt
For more information about enabling TLS on destination controls, see
.
Encrypting and Immediately Delivering Messages using a Content Filter
Before You Begin
•
To understand the concept of building conditions for content filters, see
.
•
(Optional) See
.
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 and Deliver Now (Final Action) 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.
The content filter in
shows a content filter that searches for ABA content in the message
body. The action defined for the content filter specifies that the email is encrypted and delivered.