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Spam Quarantine and Trusted/Blocked Senders
Trusted and Blocked Senders
The WatchGuard XCS allows end users to configure their own Trusted and Blocked Senders Lists to control how mail is processed depending on the sender of a message.
Trusted Senders List
The Trusted Senders List allows users to create their own lists of senders who they want to receive mail from to prevent mail from these senders from being blocked by the spam filters. Users can utilize the WebMail interface to create their own Trusted Senders List based on a sender’s email address. Trusted Senders can also be added directly via the Spam Quarantine summary email.
The Trusted Senders List overrides the following Anti-Spam actions:
Modify Subject Header
Add Header
Redirect
The following rules also apply for the Trusted Senders List:
If the message is rejected for reasons other than spam, such as viruses or attachment controls, the
Trusted Senders List will have no effect.
A Reject or Discard action will reject or drop the message regardless of the settings in the Trusted
Senders List.
If the action is set to Just Log or BCC , the trusted message will pass through, but will still be logged or
BCC’d by the system.
Pattern Filter spam actions set to Medium or High priority cannot be trusted, allowing administrators to ensure that a strong security policy is enforced.
The Trusted Senders List cannot trust items rejected by the administrator during the SMTP connection such as ReputationAuthority and DNSBL checks.
Blocked Senders List
The Blocked Senders List allows end users to specify a list of addresses from which they do not want to receive mail. These senders will be blocked from sending mail to that specific user via the WatchGuard XCS. If a sender is on the Blocked Senders List, the message can either be rejected with notification or discarded.
The Trusted Senders List is processed before the Blocked Senders List. If a Blocked Sender also appears in the Trusted Senders List, the email will be delivered.
In the event there are multiple recipients for a message and only specific recipients have blocked the sender, the message will be delivered for those recipients that did not block the sender and the message will be rejected for those who have blocked the sender.
Local users can log in and create their own list of Blocked Senders. Users do not need a local account on the system, as logins can be authenticated via LDAP to an authentication server and the user's Trusted/Blocked
Senders List is saved locally on the WatchGuard XCS.
User Guide 269
Spam Quarantine and Trusted/Blocked Senders
Enable Trusted and Blocked Senders
The Trusted and Blocked Senders List must be enabled globally by the administrator to allow users to configure their own lists.
To enable the Trusted and Blocked Senders List:
1. Select Configuration > WebMail > Trusted/Blocked Senders .
2. Select the Permit Trusted Senders or Permit Blocked Senders lists check box to enable these features.
3. Enter the Maximum # of list trusted/blocked entries per user .
The default is “100”. Valid values are from “1” to “1000000”.
4. The Internal mail server host must be set to the complete host name of the internal mail server or the specified default host name if mail is hosted on this system.
For example, if you deliver mail to your internal mail server using [email protected], enter example.com
. If your internal mail server uses [email protected], enter mail.example.com
.
5. For Blocked Senders, select the Action to perform when a user on the Blocked Senders List attempts to send mail via the WatchGuard XCS.
Reject — The message will be rejected with notification to the sender.
Discard — The message will be discarded without notification to the sender.
270 WatchGuard XCS
Spam Quarantine and Trusted/Blocked Senders
Configure WebMail Access
WebMail is required to allow users to view and edit their Trusted/Blocked Senders List.
To enable WebMail access on a network interface:
1. Select Configuration > Network > Interfaces .
2. Select the WebMail check box.
3. Click Apply .
The system must be rebooted.
4. Select Configuration > WebMail > WebMail .
5. Select the Trusted/Blocked Senders check box.
User Guide 271
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