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Hosting Dynamic MTA-STS Policies for Multiple Domains with Cloudflare Workers

Hosting Dynamic MTA-STS Policies for Multiple Domains with Cloudflare Workers

Requests about how to set up MTA-STS policies with Cloudflare are on the rise, so here's a guide that walks you through publishing MTA-STS policies for multiple domains with Cloudflare.

Email Security InsightsEmail TechnologyTechnical Guidance

DMARCbis vs. DMARC: What’s Changing?

DMARCbis vs. DMARC: What’s Changing?

The DMARC specification was first published in 2012, and the Internet Engineering Task Force is proposing changes in DMARCbis. The DMARC working group has been discussing updates to the DMARC specification so it’s more flexible and easier to understand and deploy.

Ecosystem NewsEmail Technology

Microsoft DMARC Error Codes for Bulk Senders: Troubleshooting Guide

Microsoft DMARC Error Codes for Bulk Senders: Troubleshooting Guide

In May, Microsoft began enforcing its DMARC requirements for bulk senders emailing outlook.com, hotmail.com and live.com mailboxes. Find out how to solve the error codes you're getting from Microsoft.

Email Security InsightsTechnical Guidance

dmarcian’s Sustainable Values

dmarcian’s Sustainable Values

One of the factors that drives dmarcian in our pursuit to bring DMARC to everyone is the community we build around our values. By investing time and energy into ideas bigger than email security, we are able to connect with and contribute to the greater good. Everything we do is centered around safety, sustainability and collaboration, and we’re proud to say that we don’t do it alone.

Ecosystem NewsInside dmarcian

New Zealand Government Rolls Out Secure Email Framework with Mandatory DMARC

New Zealand Government Rolls Out Secure Email Framework with Mandatory DMARC

The New Zealand Government has introduced a new framework, “Secure Government Email Common Implementation Framework,” which outlines technical guidance and best practices, like DMARC, for protecting email systems against phishing.

Ecosystem NewsEmail Security Insights

2024 FBI Internet Crime Report: 33% Increase in Losses Fueled by Phishing, Investment Fraud, Ransomware

2024 FBI Internet Crime Report: 33% Increase in Losses Fueled by Phishing, Investment Fraud, Ransomware

The FBI’s Internet Crime Complaint Center has released the 2024 Internet Crime Report. 2024 Internet Crime Trends: Phishing and spoofing lead record-breaking losses.

Ecosystem NewsEmail Security Insights

The Importance of Sources in DMARC

The Importance of Sources in DMARC

dmarcian provides you with a brief overview of a source's capabilities, links to any publicly available resources on SPF and DKIM configuration and any other useful details on that source.

DeploymentEmail Security InsightsTechnical Guidance

2025 Verizon Data Breach Investigations Report: Third-party Breaches Double

2025 Verizon Data Breach Investigations Report: Third-party Breaches Double

Verizon has released the eighteenth edition of their Data Breach Investigations Report (DBIR) covering cyber incidents taking place between November 1, 2023, and October 31, 2024, and representing victims from 139 countries.

Ecosystem NewsEmail Technology

dmarcian Talks Email Security and Brand Protection at eComm Live

In this piece, dmarcian's EMEA Director Dermot Harnett and EMEA Account Manager Jamie Murphy cover what they learned at the 2025 eComm Live Conference as retailers move to protect their brands and comply with new email ecosystem requirements.

Ecosystem NewsEmail Security InsightsInside dmarcian

SPF Record Cleanup Techniques

SPF Record Cleanup Techniques

dmarcian has been involved in email authentication in one way or another several decades, and we often see unnecessary contents within an SPF record. We've amassed an incredible amount of SPF knowledge and have created this resource to help you become aware of certain SPF references that can likely be safely removed.

Email Security InsightsTechnical Guidance