Outbound Filtering
Outbound filtering is a defensive measure against internal network zombies that may send out spam and cause the domain to be blacklisted. This allows you to be sure that none of your users violate the terms of their accounts.
Outbound filtering has most of the same filtering options as inbound filtering, with the addition of:
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The option to add a disclaimer (Message Annotation) |
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The ability to route mail based on message content |
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Note: If Email Data Compliance is licensed, there are additional health, finance, and profanity filters available to aid in following compliance laws such as SOX and HIPAA.
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Outbound filtering does not have:
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Foreign language and junk filters |
As with inbound email, outbound filtering has the option of managing the maximum size of an individual message. See Routing and Session Management for more information.
At a high level, configuring outbound filtering requires the following steps:
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Create an outbound IP profile for each mail server that will relay outbound mail through the Email Security server. This profile sets the remediation policy for detected spam and viruses. You can configure the policy for risky attachments and set a whitelist of users that are allowed to send email without outbound filtering for high-volume and bulk email senders. |
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For each outbound filtered domain, set the domain mail server to relay all outbound email to the Email Security server. |
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Change the firewall settings to block all outgoing email that attempts to bypass the domain’s mail server and the Email Security's outbound filtering. |