General
What's new ?
Understanding Product Usage
Service IP addresses and ports
End of Life
Supported Browsers
Product Settings
Administrators
Single Sign On
Active Directory
AD Connect software
Roles
Keyword Lists
Devices & Groups
Active Directory Synchronisation Explained
Active Directory Object Synchronisation
Account Password and MFA
Role Builder
Granting access to synchronise Azure AD shared mailboxes
Add the Exchange Online API permission to an existing AAD connection
Web Security
Agents & Gateway
Configuration options for the Mac OS X agent type
Configuration options for the Gateway agent type
Configuration options for the Windows agent type
Configuration options for the Chromebook agent type
Knowledge Base
Bypassing Office 365
Disable QUIC in Chrome Browser
Prevent Law features for UK organisations
Unclassified / Uncategorised Site Processing
Censornet Web Filtering Policy and Approach for Education
List of domains to bypass apps for SSL Interception
Bypass GoToMeeting & LogMeIn
Bypassing the Apple Store
Using Web Security with Sophos
Deployment Overview
Check for the presence of a system proxy user
YouTube appears to work despite Block or Warn final action applied
ERR_CERT_HAS_EXPIRED_ Digicert certificate expiry 2023
Processes used by the USS Agent for Mac OS X
Blocking Embedded Games in Google Search
Enable Enhanced Unpacking Engine
ESET issues identified
Active Directory Login Service
MIME Categories and Types
How to submit a URL reclassification request
Third Party Load Balancer Guides
What happens when my Web Security license is suspended or deleted?
Windows agent - force download of anti-malware database
SSL/TLS Strict Mode blocked ciphers
Export Agents using curl script
Installing an SSL Certificate on iOS 13
CVE-2020-15778
Custom URL parsing and overlapping patterns
YouTube Safe or Restricted mode enforced by DNS
Alter the default agent configuration poll time
Overview
Rules Engine Concepts
Filter Rules
Feature Control Rules
Browser Categories
Custom URLs
Bypass Categories
Deployment
Agent Configuration Profiles
Unblock Requests
Web Security: Product Configuration
Global Web Filtering Coverage
Web Categories List
Fair Usage Policy for Web & CASB (Inline)
Web Security: Quick Start
Web Security: Best Practice Guide
Deploying Web Security
USS Agent for Windows
Getting Started
Requirements
Changelog - Windows Agent
Download Microsoft Windows agent
Deploying via Wizard
Deploying via Startup/Shutdown script
Deploying the Windows agent via a custom MSI
Deployment via GPO
Deploying via Microsoft Intune
Command-line parameters
Collecting debug information - USS Agent for Windows
Processes used by USS Agent for Windows
How to disable Device Guard or Credential Guard
Upgrading the USS agent from the v3.x release to the v4.x release
Installing the USS Agent SSL certificate in Firefox
Tray icon status codes
Temporary files generated by the endpoint agent software
Windows Agent Log File Storage
Incompatibility with nmap based products such as Wireshark
Deploying via Microsoft SCCM
USS Agent for MacOS
Getting Started
Requirements
Changelog - MacOS Agent
Download MacOS Agent
Install - Deploying via Wizard
Command-line parameters
Collecting debug information - USS Agent for Mac OS X
Mac OS X agent VPN client incompatibility
Mac OS X Agent Log File Storage
Deploying the Mac OS X agent using JAMF
USS Agent for Chromebook
Getting Started
Requirements
Changelog - Chromebook Agent
Download Chromebook agent
Deploying Chromebook agent via Google Admin console
USS Gateway
Configuration
Overview
Charts
Authentication & Identification
Deployment
Network
Settings
System
Advanced configuration
Configuring USS Gateway to work with LoadBalancer.org software load balancer
Regular Gateway server maintenance
Preparing the USS Gateway for use with a load balancer
Installation (v2.x)
USS Gateway - Getting Started
USS Gateway - Requirements
Download Gateway Virtual Machine
Changelog - Gateway
Installation
First time Configuration
Accessing the Command Line
Take Packet Capture From Command Line
Reset Linux Password To Log Into Gateway Command Line
Captive Portal on Samsung Devices
'The Requested Content Was Blocked' Error Message
Resizing a Partition in ESX Server Virtual Machine
Interception of iOS and Android apps (SSL Pinning)
Deploying Web Browser proxy settings
Migrating the SSL intercept certificate to a new gateway
Using an intermediate CA signed by Windows DC root CA
Installing on Hyper-V
Updating the USS Gateway
Importing an SSL Certificate into the USS Gateway
Collecting debug information - USS Gateway
Adding a Static Route on a Gateway
USS Gateway Version 1 to Version 2 Migration
Chromebook Allowlist USS Gateway Proxy
Cloud App. Security (CASB)
Email Security
Example Rules
Digest generation and Quarantines
Executive Tracking
Blocking emails from hacked Gmail accounts
Stop specific users from receiving Word documents
Detect credit card numbers in an email
Disable spam filtering for specific mailboxes
Nearby Domain Rule
How to Prefix a banner to inbound emails
IP Geolocation connection Rule
CoreService filter classifications
Reject oversized emails
Knowledge Base
Configure Office 365 for EMS
Safelisting Email Security IP addresses in Office 365
Configure GMail using Google Workspace for EMS
MX records and IP addresses for EU customers
MX records and IP addresses for USA customers
MX records and IP addresses for UAE customers
MX records and IP addresses for all regions
Reporting spam or false positives
Configure outbound email for Exchange 2007/2010
Configuring TLS encryption
LinkScan: on-demand URL protection
Bulk Email & Fair Usage
Queue retention and retry times
Personal Safe Lists and Personal Deny Lists
Configure outbound DMARC
Configure outbound DKIM
Configure outbound email for Exchange 2016
CEA - Data storage explained
Reject message due to message “550 5.1.8 sender denied”
Insufficient system resources message on inbound email delivery
Email Sandbox - Supported file types
Outbound Delivery error: 550 Unable to relay
[Marketing Medium] or [High Medium] prefixed to the subject of mails
DMARC Failure Reporting
Image Analysis for Email supported image types
Powershell Script to list Office 365 Shared Mailboxes
What happens when my Email Security license is suspended or deleted?
Example Spam Digest or Quarantine Report
No Valid MX Record NDR message
How to onboard users into the End User Portal
Installing the Outlook add-in for Email Security
How to avoid multiple disclaimers being added when forwarding or replying to emails
Cisco Fixup Protocol
Adding images to email disclaimers
Reject Top Level Domains
Adding an alias to a primary mailbox
Outlook add-in is not the newest version
Temporary Server Error
Unable to Relay error on outbound email
Notify Recipient/Sender Actions
Managing DNS in Office 365
Upgrading to LinkScan version 2
MX records and IP addresses for India customers
DLP Dictionaries
Activate the Quarantine Portal for Spam Digest users
DMARC Abuse Report received even though it passes DMARC
Display Name Detection
How to use Custom Rule Data (formerly Dictionaries)
HTML attachments
How to block double extension filenames
Upgrade Outlook Add-in for reporting spam and phishing email
How to use the Domain Name Detection rule
Email Security: Best Practice Guide
How to detect simplified Chinese character sets
How does DMARC work?
Securemail (add-on)
Overview
Email Security: Quick Start
Message Rules
Connection Rules
Default Rules
Custom rule Data
Global Quarantine
Personal Quarantine
Spam Deny List
Spam Safe List
Mailboxes
Product Configuration
Group Management
Outlook Add-in V2
Placeholders for inserting message data into actions
Creating Custom Digests
Post Delivery Email Deletion (Retract)
Advanced Email Sandbox - Overview
Redirect emails to a different address
Configure Inbound mail on Office 365 to reject non-EMS emails
Cloud MFA
Knowledge Base
Managing an MFA lock-out
Count how many users are in an AD group
ADFS Login not being intercepted for MFA
Configure FortiGate to use PAP for Challenge-Response
Overview
Quick Start
Rules Engine Concepts
Authentication Client (server)
Authentication App (enduser)
Product Configuration
Third Party Guides
Configuring Windows Logon Protection
Configuring RADIUS Protection
Deploying the Cloud MFA Authentication App
Configuring RD Web Access using IIS Website Protection
Products not supporting RADIUS Challenge-Response
Configuring AD FS Protection
Analytics
Activity Reports
Charts
Schedules
Data retention periods
Admin Auditing
What's new with Cloud Reporting?
Account Settings
ASE
Compliant Email Archive (CEA)
Compliant Email Archive Quick Start Guide
Understanding Data Guardians
Email Archive End User Guide
Configuring journaling on Exchange 365
Configuring authentication with O365 via OAuth
Configuring an Impersonation Account
Folder Replication Configuration
Assigning delegation via OAuth with User Directory
Compliant Email Archive - LDAP Configuration
Configuring journaling for Exchange and Office 365
Configuring a local user account
Re-enabling Outlook Homepage Tab
Ingest mail via Mailbox Reader for Exchange 2013 - 2019
Ingest mail via Mailbox Reader
End User Email Archive Authentication with ADFS
Legal
Introduction
Privacy Policy
Master Services Agreement (MSA)
Standard Contractual Clauses (SCCs)
Website Usage and Cookie Policies
Posture Management
DLP
Applying a DLP Policy in Web Security
Grammar Regular Expression Engine
Applying a DLP policy in Email Security
DLP Policies
SAT
Safelisting
Allow SAT Domains for EMS customers
Allow SAT Domains for non EMS customers
Google Workspace - SAT Safelisting
M365 - SAT Safelisting
Reports
User Import
Adding a New Admin on the SAT Portal
Manually Adding A New User to the SAT portal
Deleting Multiple Users via a CSV tempate
Setup AD-Sync on the SAT Portal
Upload Multiple Users via CSV template
Configure Google User Sync for SAT
On-Demand
Building a Simulation using On-Demand
Using the SAT Sim Creation Tool
Using the On-Demand Feature within the SAT Portal
Calendared Sends via On-Demand
Setup Guide for SAT Portal
Single Sign On (SSO) / M365 Configuration on the SAT Portal
How To See Your Automated SAT Journey
IDaaS
Identity Provider Configuration Guides
Service Provider Configuration Guides
Configuring Microsoft Azure as an Identity Provider
Configuring JumpCloud as an Identity Provider
Dropbox SSO
Salesforce SSO
Google Workspace SSO
Office 365 SSO with External Identity Provider
Product Notice - IDaaS and Office 365 apps
Adding an Office 365 app tile for convenience
Log Streaming
All Categories > Email Security > Knowledge Base > Email Security: Best Practice Guide
Updated 10 months ago
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Follow this best practice guide to using Email Security.