Руководство Пользователя для Cisco Cisco Email Security Appliance C160
12-9
Cisco IronPort AsyncOS 7.5 for Email Configuration Guide
OL-25136-01
Chapter 12 Cisco IronPortEmail Encryption
Step 9
Optionally, enable read receipts. If you enable this option, the sender receives a
receipt when recipients open the secure envelope.
receipt when recipients open the secure envelope.
Step 10
Optionally, click Advanced to configure the following settings:
•
Enter the length of time (in seconds) that a message can be in the encryption
queue before timing out. Once a message times out, the appliance bounces the
message and sends a notification to the sender.
queue before timing out. Once a message times out, the appliance bounces the
message and sends a notification to the sender.
•
Select an encryption algorithm:
–
ARC4. ARC4 is the most common choice, providing strong encryption
with minimal decryption delays for message recipients.
with minimal decryption delays for message recipients.
–
AES. AES provides stronger encryption but also takes longer to decrypt,
introducing delays for recipients. AES is typically used in government
and banking applications.
introducing delays for recipients. AES is typically used in government
and banking applications.
•
Enable or disable the decryption applet. Enabling this option causes the
message attachment to be opened in the browser environment. Disabling this
option causes message attachments to be decrypted at the key server. If you
disable this option, messages may take longer to open, but are not dependent
on the browser environment.
message attachment to be opened in the browser environment. Disabling this
option causes message attachments to be decrypted at the key server. If you
disable this option, messages may take longer to open, but are not dependent
on the browser environment.
Step 11
In the Message Settings section, enable or disable Secure Reply All.
Step 12
Enable or disable Secure Message Forwarding.
Step 13
Select an HTML notification template. Choose from HTML notifications you
configured in text resources. If you did not configure a template, the system uses
the default template.
configured in text resources. If you did not configure a template, the system uses
the default template.
Note
The key server uses an HTML or text notification based on the recipient’s
email application. You must configure notifications for both.
email application. You must configure notifications for both.
Step 14
Select a text notification template. Choose from text notifications you configured
in text resources. If you did not configure a template, the system uses the default
template.
in text resources. If you did not configure a template, the system uses the default
template.
Step 15
Enter a subject header for encryption failure notifications. The appliance sends a
notification if the encryption process times out.
notification if the encryption process times out.
Step 16
Select an encryption failure notification template for the message body. Choose
from an encryption failure notification template you configured in text resources.
If you did not configure a template, the system uses the default template.
from an encryption failure notification template you configured in text resources.
If you did not configure a template, the system uses the default template.