

Default behavior for DKIM and Microsoft 365.Disabling the DKIM signing policy for a custom domain.Steps to configure DKIM for more than one custom domain.Steps to manually upgrade your 1024-bit keys to 2048-bit DKIM encryption keys.Steps to Create, enable and disable DKIM from Microsoft 365 Defender portal.How DKIM works better than SPF alone to prevent malicious spoofing.This article lists the steps to use DomainKeys Identified Mail (DKIM) with Microsoft 365 to ensure that destination email systems trust messages sent outbound from your custom domain. Microsoft Defender for Office 365 plan 1 and plan 2.This new experience brings Defender for Endpoint, Defender for Office 365, Microsoft 365 Defender, and more into the Microsoft 365 Defender portal. The improved Microsoft 365 Defender portal is now available.
