• Cloud App Security
• Understanding Cloud App Security
  • Understanding Email Security
    • Understanding Post-Delivery Email Recheck
  • Using Data Leak Protection
  • Understanding Anomalies
  • Understanding Click-Time Protection
• Configuring Cloud App Security
  • Subscribing to Cloud App Security
  • Activating Cloud Applications for Cloud App Security
  • Activating Office 365 and Microsoft 365 Cloud Applications
    • Manually Configuring Office 365 and Microsoft 365 Cloud Applications During Activation
• Managing Quarantine for Office 365 and Microsoft 365
  • Setting Up a Quarantine Mailbox for Office 365 and Microsoft 365 Email (Exchange Online)
  • Setting Up a Quarantine Folder for Office 365 and Microsoft 365 OneDrive
  • Setting Up a Quarantine Folder for Office 365 and Microsoft 365 SharePoint
  • Using the Quarantine View for Office 365 and Microsoft 365 Email (Exchange Online)
  • Using the Quarantine Page
  • Using the Quarantined File Creator Dashboard
  • Using the User Dashboard for Office 365 and Microsoft 365
  • Managing Restore Requests
• Using the SonicWall Cloud App Security Dashboard
  • Using the Security Events Widgets
    • Changing a Security Event Widget to an Alert or Custom Query
    • Resetting a Security Event Widget
    • Hiding a Security Event Widget
    • Configuring Security Event Widget Custom Queries
    • Adjusting the Time Scale
  • Viewing the Summary of Security Events
  • Viewing Login Events
  • Viewing Secured Applications
  • Viewing the Scanned Files Summary
• Managing Security Events
  • Using the Security Event Graphs
    • Viewing Security Events by Severity
    • Viewing Security Events by State
    • Viewing Security Events by Cloud Application
  • Viewing and Acting on Security Events
    • Removing Filters
    • Acting on Security Events
  • Managing Multiple Events
• Managing Policies
  • Understanding Cloud App Security Policies
    • Before You Set Email Policies
    • Monitor only
    • Detect and Prevent
    • Protect (Inline)
  • Creating New Policy Rules
    • Creating Data Leak Protection Policy Rules
      • Using Regular Expressions in DLP Policies for Email
    • Creating Malware Policy Rules
    • Creating Threat Detection Policy Rules
    • Creating Policy Rules for Click-Time Protection
    • Creating Office 365 and Microsoft 365 Email Encryption Policy Rules
    • Creating Custom Query Policies
  • Stopping Policy Rules
  • Removing Policy Rules
  • Managing Office 365 and Microsoft 365 (Exchange Online) Mail-Flow Rules
• • Configuring Data Leak Protection Detection Rules
  • Reactivating Data Leak Protection
  • Predefined Data Leak Protection Policy Rules
    • Global Rules
    • Credentials and Secrets
    • Predefined Data Leak Protection Rules for Specific Countries
      • Argentina
      • Australia
      • Belgium
      • Brazil
      • Canada
      • Chile
      • China
      • Columbia
      • Denmark
      • Finland
      • France
      • Germany
      • Hong Kong
      • India
      • Indonesia
      • Ireland
      • Israel
      • Italy
      • Japan
      • Korea
      • Mexico
      • The Netherlands
      • Norway
      • Paraguay
      • Peru
      • Poland
      • Portugal
      • Singapore
      • Spain
      • Sweden
      • Taiwan
      • Thailand
      • Turkey
      • United Kingdom
      • United States
      • Uruguay
      • Venezuela
• Managing Spam and Anti-Phishing
  • Managing Spam
  • Managing User-Reported Phishing
  • Customizing Warning Messages
  • Managing Nickname Impersonation
  • Managing the Anti-Phishing Exceptions
    • Managing Excluded Email Addresses
      • Adding Email Addresses to the Anti-Phishing Block-List
      • Removing Email Addresses from the Anti-Phishing Block-List
    • Managing Excluded IP Addresses
      • Adding IP Addresses to the Anti-Phishing Block-List
      • Removing IP Addresses from the Anti-Phishing Block-List
    • Managing Excluded Domains
      • Adding Domains to the Anti-Phishing Block-List
      • Removing Domains from the Anti-Phishing Block-List
    • Creating Block-List Rules from Email Messages
    • Managing the Anti-Phishing Allow-List
      • Creating Anti-Phishing Allow-List Rules from the Security Events Page
      • Creating Anti-Phishing Allow-List Rules from the Anti-Phishing Allow-List Page
    • Managing the Anti-Phishing Block-List
• Using the Mail Explorer
  • Using the Mail Explorer to Search Emails
  • Using the Mail Explorer to Quarantine Items
  • Using the Mail Explorer to Add Items to the Blocked List
• Working with Office 365 and Microsoft 365 Email Encryption
• Configuring and Using Click-Time Protection
  • Activating Click-Time Protection
  • Configuring Click-Time Protection
    • Configuring the Click-Time Protection Workflow
    • Configuring Custom Click-Time Protection for Specific Domains
      • Adding Custom Click-Time Protection for Specific Domains
      • Deleting Custom Click-Time Protection for Specific Domains
  • Using Click-Time Protection
    • Viewing Security Events for Click-Time Protection
    • Managing Email Messages with Click-Time Protection
    • Creating Custom Queries for Click-Time Protection
• Using Cloud App Security Analytics
  • Viewing the Summary Report
  • Viewing the Weekly Reports
  • Viewing Email Analytics
  • Viewing Office 365 and Microsoft 365 OneDrive Analytics
  • Viewing Office 365 and Microsoft 365 SharePoint Analytics
  • Viewing Shadow SaaS Analytics
  • Viewing and Creating Custom Queries
    • Creating Custom Queries
    • Adding Custom Queries to the Dashboard
• Configuring Cloud Applications in the Cloud App Store
  • Configuring Office 365 and Microsoft 365 for Cloud App Security
  • Re-Authorizing Cloud Applications
• Managing Security Applications in the Security App Store
  • Starting Security Applications
  • Stopping Security Applications
• Managing Anomaly Exceptions
  • Creating Exceptions Based on Anomaly Events
  • Sending Anomaly Event Notifications
• Managing Security Tool Exceptions
• Using the System Log
  • Viewing the System Log
  • Exporting the System Log
• Managing Cloud App Security Licenses
  • Adding Administrator Users
  • Adding Read-Only Users
  • Managing Group Licensing
  • Unassigning Cloud App Security Licenses
• SonicWall Support
  • About This Document

Using Regular Expressions in DLP Policies for Email

Using regular expressions, you can configure specific DLP policies to be triggered based on the content of the subject line of an email message.

Regular expression support for Data Leak Protection (DLP) requires an Advanced license for Cloud App Security.

Regular expression support is only available for the subject line of email messages. It is not supported within the content of the email messages.

To configure regular expression support

1. Navigate to Policy.

2. Select an existing DLP policy or create a new one.

   Regular expression support for email notifications is only available for DLP policies.

3. In the DLP Criteria section, select Detect Phrases in Email Subject.
4. In the Phrase to detect (Regular Expression) field, enter the text or regular expression to be evaluated.
5. From the DLP workflow list, select Email is allowed. Encrypted by Microsoft.
6. In the Alerts section, you select:

   • Send email alert to sender when Subject Regex is used to have an email message sent to the sender when

     • Click the gears icon to modify the email message sent to the sender.

   • Send email alert to sender when Subject Regex is not used to have an email message sent to the sender when

     • Click the gears icon to modify the email message sent to the sender.
7. Click Save and Apply.