microsoft

Update: Includes a revision that Microsoft will now reject messages rather than moving to junk from large senders that don’t meet the sending requirements.. Everything else remains the same.  When rejected, the following message will be sent instead “550; 5.7.515 Access denied, sending domain [SenderDomain] doesn’t meet the required authentication level.” This blog: Microsoft has…Continue Reading: Microsoft announces new email requirements for bulk senders

Microsoft has announced that from July 2023, it will honor DMARC policies in M365 and its consumer properties. By respecting a domain’s DMARC policy, Microsoft helps create a safe digital environment for its customers and consumers by ensuring that exact domain impersonation attacks are blocked…Continue Reading: Microsoft announces its new handling of DMARC policies

As of March 2023, Microsoft 365 has started sending aggregate DMARC reports to domains with a Microsoft MX record. This long-awaited release fixes a blindspot with inbound mail to an M365 tenant that existed; previously, where Microsoft didn’t report on DMARC results, you would miss crucial insight (and legitimate senders) that could then be blocked from sending emails once p=reject was enabled…Continue Reading: How Microsoft’s new aggregate DMARC reports enhance visibility of your sending sources

We explore how several email solutions today, including Microsoft O365, do not have the capability to send crucial DMARC reports to your reporting service…Continue Reading: An Office 365 reporting module for DMARC