Cloud Message Scan (CMS) and Local Scan

Cloud Edge automatically uses cloud-based Cloud Message Scan (CMS) for email security scanning. If CMS is not available (for example, if there are network issues between the on-premises Cloud Edge gateway and the CMS service), Cloud Edge continues to provide email security by switching to local email security scanning on the Cloud Edge gateway. Once CMS service is available, Cloud Edge can automatically revert back to CMS email security.

Note

Cloud Edge does not scan IPv6 email traffic using either Cloud Message Scan or local scan. IPv6 email traffic passes through the gateway without scanning.

There are certain differences between cloud-based CMS scan and local scan.

Functionality	Cloud Message Scan (CMS)	Local Scan
Anti-Malware	Action: Set to Block or Tag Tags: Add tags to mail subject and body Virtual Analyzer: Cloud-based functionality (disabled by default) Predictive Machine Learning: Cloud-based functionality (disabled by default) Encrypted attachment: Add tags to mail body	Action: Automatically set to Tag (tag and clean) Tags: Add tags to mail subject
Anti-Spam	Tags: Add tags to mail subject and body	Tags: Add tags to mail subject
Content Filtering	Enable/disable: Configure separately from anti-spam setting Notification: Configure separately from anti-spam setting Tags: Add tags to mail subject and body Message types: Three message types for email anti-spam and content filtering: Email Anti-spam, Email MyNumber, and Email Content MyNumber: Supports MyNumber filtering in message body and attachments	Enable/disable: Enabled and disabled by enabling or disabling the anti-spam setting Notification: Uses the anti-spam notification Tags: Uses tag set with anti-spam setting Message types: Uses one message type for email anti-spam and content filtering: Email Anti-spam MyNumber: Supports MyNumber filtering in message body
Exception Lists	Uses true file types	Uses file extensions
Advanced Settings	Protocol support: SMTP/SMTPS, POP3/POP3S, and IMAP/IMAPS Uses STARTTLS commands	Protocol support: SMTP and POP3