This is a selection of our blog content that includes useful articles on understanding, deploying and managing DMARC, SPF, DKIM and related technologies.
The phrase No Auth, No Entry is being used to communicate what will soon be required to get email delivered into Gmail.
Domain owners can publish policies that will be applied to email that is not compliant with DMARC: p=none is used to collect feedback and gain visibility into email streams without impacting existing flows. It’s a crucial first step. p=quarantine allows email receivers to treat email that fails the DMARC check as suspicious and files them…
Sending other people’s email in a DMARC compliant manner can be accomplished in a number of different ways. This article is intended for Email Service Providers (ESPs) and any business that sends email using their own customer’s domains (examples: CRMs, talent management companies, billing systems, etc).
People often configure their DMARC records and use the “RUF” tag to ask for Forensic/Failure reports. However, they’re often slow to arrive. If you just added the RUF tag to your DMARC record, be aware that it might take up to 24 hours for your change to be picked up by the larger Internet. If…
If you’re at a large organization looking to deploy DMARC, view the video on dmarcian’s deployment process. It’s worth your time! Here’s a checklist you can use to get DMARC into place:
We’ve put together a short technical overview of DMARC: This video is part of a larger video series on all things DMARC. The transcript follows:
We’ve put together a short overview video on SMTP: This video is part of a larger video series on all things DMARC. The transcript follows:
We’ve put together a short video on DMARC’s ROI: This video is part of a larger video series on all things DMARC. The transcript follows:
We’ve put together a short video on our own DMARC deployment process: This video is part of a larger video series on all things DMARC. The transcript follows:
We’ve put together a short overview video about DKIM: This video is part of a larger video series on all things DMARC.
We’ve put together a short overview video about SPF: This video is part of a larger video series on all things DMARC.
We’ve put together a short video on the benefits of deploying DMARC: This video is part of a larger video series on all things DMARC. The transcript follows:
We’ve put together a short video on how DMARC works: This video is part of a larger video series on all things DMARC. The transcript follows:
We’ve put together a short video that is an overview of DMARC: This video is part of a larger video series on all things DMARC. The transcript follows:
DMARC introduces the concept of “Identifier Alignment” to the world of email. The concept is needed as SPF and DKIM are stand-alone technologies capable of associating a domain with a piece of email. When a receiver uses SPF, the receiver looks at the domain found in the RFC5321.MailFrom to figure out where to look for…
Yahoo is placing ymail.com and rocketmail.com into p=reject on November 2nd. This information is being provided to give people and companies time to prepare, as the #1 piece of feedback from when Yahoo moved yahoo.com to a p=reject was that Yahoo didn’t let the Internet know about the move in advance. Hopefully, this announcement will…
If PTR mechanisms are detected, the current diagnostic output is: Warning: PTR mechanisms SHOULD NOT be used and cannot be resolved using this diagnostic tool. More info at <this page!>. What does the PTR mechanism mean? When an email receiver gets a piece of email and the PTR mechanism is in the sender’s SPF record,…
If you publish an SPF record and use the a mechanism, but your domain doesn’t actually have an A record in place, then you’ll see this warning. Here’s a sample SPF record that contains the a mechanism (the a is in bold): v=spf1 a include:_spf.google.com ~all The A DNS record is how you use the…
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