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 appliance and the CMS service), Cloud Edge continues to provide email security by switching to local email security scanning on the Cloud Edge appliance. 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 appliance 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)

  • 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