Read the original article: Loose SPF, DKIM, DMARC, and ARC Settings Sabotage Security
It’s safe to say that all of our Cyren Inbox Security customers use the native Office 365 security capabilities of Exchange Online Protection and Advanced Threat Protection (now collectively called Microsoft Defender for Office 365).
Read the original article: Loose SPF, DKIM, DMARC, and ARC Settings Sabotage Security