Hosted Email Security scans outgoing email messages before delivery if outbound filtering is enabled. Hosted Email Security applies the following policy rules for filtering:
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Spam and phishing
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Malware (viruses, spyware, and so on)
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Web reputation
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Data Loss Prevention (DLP)
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Transport Layer Security (TLS) check
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DomainKeys Identified Mail (DKIM) signing
In addition, outbound encryption is seamlessly integrated with the content-filtering capabilities of Hosted Email Security, using policy-based encryption to secure email messages. The service does not automatically encrypt email messages. When outbound filtering is enabled, outbound encryption appears as a rule option within the Hosted Email Security administrator console. You will need to configure rules that apply encryption as a rule action.
To learn about the policy rule used to encrypt outbound messages, see Encrypting Outbound Messages. To learn more about how to enable outbound protection for a managed domain, see step 5 in Adding a Domain.
Hosted Email Security evaluates outgoing messages against regulatory compliance templates defined in DLP policies to prevent data leakage. For details about DLP, see Data Loss Prevention (DLP).