How to Securely Allow SMTP AUTH Only from a Specific IP Address in Microsoft 365 with a CA Policy.
If you want to securely allow SMTP AUTH only from a specific IP address in Microsoft 365, this guide will walk you through the safest and recommended approach to do that. SMTP AUTHENTICATION is still required for some applications or devices (printers, scanners, etc.) and older mail systems that don't support Multi-Factor Authentication (MFA), to […]
