Cisco Cisco Email Security Appliance C190 Guia Do Utilizador
10-8
Cisco AsyncOS 8.5 for Email User Guide
Chapter 10 Mail Policies
Configuring Mail Policies
Finding Which Policies Apply to a Sender or Recipient
Use the Find Policies section at the top of the Mail Policies page to search for users already defined in
incoming or outgoing mail policies.
incoming or outgoing mail policies.
For example, type
bob@example.com
and click the Find Policies button to display results showing which
policies contain defined users that will match the policy.
Click the name of the policy to edit the users for that policy.
Note that the default policy will always be shown when you search for any user, because, by definition,
if a sender or recipient does not match any other configured policies, it will always match the default
policy.
if a sender or recipient does not match any other configured policies, it will always match the default
policy.
Managed Exceptions
Using the steps shown in the two examples above, you can begin to create and configure policies on a
managed exception basis. In other words, after evaluating your organization’s needs you can configure
policies so that the majority of messages will be handled by the default policy. You can then create
additional “exception” policies for specific users or user groups, managing the differing policies as
needed. In this manner, message splintering will be minimized and you are less likely to impact system
performance from the processing of each splinter message in the work queue.
managed exception basis. In other words, after evaluating your organization’s needs you can configure
policies so that the majority of messages will be handled by the default policy. You can then create
additional “exception” policies for specific users or user groups, managing the differing policies as
needed. In this manner, message splintering will be minimized and you are less likely to impact system
performance from the processing of each splinter message in the work queue.
You can define policies based on your organizations’ or users’ tolerance for spam, viruses, and policy
enforcement.
enforcement.
outlines several example policies. “Aggressive” policies are
designed to minimize the amount of spam and viruses that reach end-users mailboxes. “Conservative”
policies are tailored to avoid false positives and prevent users from missing messages, regardless of
policies.
policies are tailored to avoid false positives and prevent users from missing messages, regardless of
policies.
Table 10-3
Aggressive and Conservative Email Security Manager Settings
Aggressive Settings
Conservative Settings
Anti-Spam
Positively identified spam: Drop
Suspected spam: Quarantine
Marketing mail: Deliver and
prepend “
prepend “
[Marketing]
” to the
subject messages
Positively identified spam: Quarantine
Suspected spam: Deliver and prepend
“
“
[Suspected Spam]
” to the subject of messages
Marketing mail: Disabled
Anti-Virus
Repaired messages: Deliver
Encrypted messages: Drop
Unscannable messages: Drop
Infectious messages: Drop
Repaired messages: Deliver
Encrypted messages: Quarantine
Unscannable messages: Quarantine
Infectious messages: Drop
Virus
Filters
Filters
Enabled, no specific filename
extensions or domains allowed to
bypass
extensions or domains allowed to
bypass
Enable message modification for
all messages
all messages
Enabled with specific filename extensions or
domains allowed to bypass
domains allowed to bypass
Enable message modification for unsigned
messages
messages