Cisco Cisco Content Security Management Appliance M160 Guía Del Usuario
7-7
AsyncOS 8.3.5 for Cisco Content Security Management User Guide
Chapter 7 Spam Quarantine
Using Safelists and Blocklists to Control Email Delivery Based on Sender
Related Topics
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Limiting Which Recipients Have Mail Quarantined
You can use multiple mail policies on the Email Security appliance (Mail Policies > Incoming Mail
Policy) to specify a list of recipient addresses for which mail will not be quarantined. Select ‘Deliver’
or ‘Drop’ instead of quarantine when configuring the anti-spam settings for the mail policy.
Policy) to specify a list of recipient addresses for which mail will not be quarantined. Select ‘Deliver’
or ‘Drop’ instead of quarantine when configuring the anti-spam settings for the mail policy.
Ensuring That Message Text Displays Correctly
AsyncOS attempts to determine the character set of a message based on the encoding that is specified in
the message headers. However, if the encoding specified in the headers does not match that of the actual
text, the message will not be displayed properly when viewed in the spam quarantine. This situation is
more likely to occur with spam messages.
the message headers. However, if the encoding specified in the headers does not match that of the actual
text, the message will not be displayed properly when viewed in the spam quarantine. This situation is
more likely to occur with spam messages.
To ensure that message text displays correctly for these messages, see instructions for specifying a
default encoding in the Spam Quarantine chapter of the documentation for your Email Security
appliance.
default encoding in the Spam Quarantine chapter of the documentation for your Email Security
appliance.
Spam Quarantine Language
Each user selects a language in the spam quarantine from the Options menu at the top right of the
window.
window.
Using Safelists and Blocklists to Control Email Delivery Based
on Sender
on Sender
Administrators and end users can use safelists and blocklists to help determine which messages are
spam. Safelists specify senders and domains that are never treated as spam. Blocklists specify senders
and domains that are always treated as spam.
spam. Safelists specify senders and domains that are never treated as spam. Blocklists specify senders
and domains that are always treated as spam.
You can allow end users (email users) to manage the safelist and blocklist for their own email accounts.
For example, an end user may receive email from a mailing list that no longer interests him. He may
decide to add this sender to his blocklist to prevent emails from the mailing list from being sent to his
inbox. On the other hand, end users may find that emails from specific senders are sent to their spam
quarantine when they do not want them to be treated as spam. To ensure that messages from these senders
are not quarantined, they may want to add the senders to their safelists.
For example, an end user may receive email from a mailing list that no longer interests him. He may
decide to add this sender to his blocklist to prevent emails from the mailing list from being sent to his
inbox. On the other hand, end users may find that emails from specific senders are sent to their spam
quarantine when they do not want them to be treated as spam. To ensure that messages from these senders
are not quarantined, they may want to add the senders to their safelists.
Changes that end users and administrators make are visible to and can be changed by either.
Message Processing of Safelists and Blocklists
A sender’s being on a safelist or blocklist does not prevent the appliance from scanning a message for
viruses or determining if the message meets the criteria for a content-related mail policy. Even if the
sender of a message is on the recipient’s safelist, the message may not be delivered to the end user
depending on other scanning settings and results.
viruses or determining if the message meets the criteria for a content-related mail policy. Even if the
sender of a message is on the recipient’s safelist, the message may not be delivered to the end user
depending on other scanning settings and results.