Whitelist
- Microsoft - Configuration Instructions for Direct Message Injection (DMI)
- --- Microsoft - Whitelist Implementation in ATP When Using DMI Delivery Method
- Microsoft - Specific Whitelist implementation for Office 365 by IP address
- --- Microsoft - Whitelist Implementation for Office 365 - Transport Rules
- --- Microsoft - Whitelist Implementation by Header in Office 365
- --- Microsoft - Whitelist Implementation by Header in Exchange 2013, 2016
- --- Microsoft - Instructions to View Images in Outlook
- Google - Configuration Instructions for Direct Message Injection (DMI)
- Google - Specific Whitelist Implementation for Google Workspace by IP
- Google - Implementation of Whitelist specific to Google Workspace by Header
- Whitelist Implementation for different technologies