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Too many SPF lookups?

Too many SPF lookups?

People sometimes run into the “too many DNS lookups” error when rolling out and managing SPF. It doesn’t help that there is a lot of bad guidance on the internet. This article describes how to fix this issue. SPF ships with a built-in limit to the number of “DNS-querying mechanisms” that a... Read more »

Security InsightsTechnical Guidance

Published a DMARC record but haven’t received any XML Reports?

Published a DMARC record but haven’t received any XML Reports?

A common problem people face when implementing DMARC is that they are not receiving XML reports. Troubleshoot the common errors.

Deploymentdmarcian PlatformTechnical Guidance

How to use Domain Groups

How to use Domain Groups

Domain Groups, available on Plus and Enterprise plans, allow dmarcian users to easily group and manage related domains. Common grouping strategies include the following: When a Domain Group has been created and populated with domains, the Domain Overview section of our DMARC Management Platform will note the presence of the... Read more »

dmarcian Platform

Explanation of CSV columns in data exports

Explanation of CSV columns in data exports

dmarcian users can export Detail Viewer data via CSV. When doing so, the CSV will contain the following columns: Explanations for each column follow: Header-From The Header-From column contains the “DMARC domain” of the row of data. The DMARC domain is the domain found in the From: header of a piece... Read more »

dmarcian Platform

How does dmarcian identify sources/forwarding/threat?

How does dmarcian identify sources/forwarding/threat?

dmarcian maintains rules to classify DMARC data into 4 high level categories. Our categories are: When we investigate data to add a rule, we try to identify where email is coming from and whether or not the source can be configured for DMARC compliance. We publish the results of our investigations under a creative... Read more »

dmarcian Platform

Email Marketers: DMARC Just Delivered

Email Marketers: DMARC Just Delivered

In recognition of Safer Internet Day, John Rae-Grant (Google Product Manager) just wrote about 2 significant changes coming to Gmail on the web. Both changes give users more visibility into the underlying trustworthiness of a piece of email. The first change gives users an at-a-glance view of the state of TLS for an... Read more »

Ecosystem News

SMTP Relay for Third Party Sender DMARC Compliance

SMTP Relay for Third Party Sender DMARC Compliance

How can you eventually move to a p=reject policy when third parties are unable to send email properly on your behalf? In many cases, a DMARC compliant SMTP relay server can be used to do the trick. In this article, we’ll explore some of the facets of sending DMARC compliant... Read more »

DeploymentEmail TechnologyTechnical Guidance

No Auth, No Entry

No Auth, No Entry

The phrase No Auth, No Entry is being used to communicate what will soon be required to get email delivered into Gmail. The Auth part refers to email authentication, and the No Entry part means “we won’t deliver what you’re sending us if you’re not using email auth technology.” Email... Read more »

Ecosystem NewsSecurity Insights

DMARC is a one-time upgrade

DMARC is a one-time upgrade

DMARC brings tangible benefits to those who deploy it. In our work to help as many people as possible deploy DMARC, we’ve uncovered an interesting truth. DMARC is a one-time upgrade. Viewed as a one-time upgrade, the process of deploying DMARC becomes obvious. Pull together a list of domains, use... Read more »

Deployment

How to deploy DMARC for inbound processing

How to deploy DMARC for inbound processing

As DMARC adoption increases, more people are looking at using DMARC to filter their own email. We’ve put together this article to outline how to do “DMARC inbound.” Email is vast and DMARC is still being adopted. When you start filtering inbound email using DMARC, you’ll discover two important insights:... Read more »

DeploymentTechnical Guidance