Sometimes your site has to rely on content from other sources. With Document Policies, you have more control over the embedded documents. Let’s have a quick look at this new Feature Policy extension.

After analyzing millions of DMARC reports, I came to the disappointing conclusion that only a fraction of them comply with the DMARC IETF RFC guidelines. Most of them lack mandatory elements or hold incorrect element values.

The most common mechanisms for securing email explained (SPF, DKIM, DMARC, ARC, DANE, MTA-STS, STARTTLS Everywhere, and TLS-RPT).