DMARC: The Gatekeeper

Information about DMARC: Domain-based Message Authentication, Reporting, and Conformance

M365 overriding DMARC results
If an email is delivered to the inbox in M365 even though the email fails DMARC, the first thing to look for is the Antispam Report in the headers of the em...
Wed, 17 Feb, 2021 at 4:03 PM
What is DMARC?
Many how-to articles tout the benefits of DMARC without mentioning a crucial step: Enforcement. A key part of the DMARC (Domain-based Message Authentic...
Mon, 24 May, 2021 at 11:33 AM
I pointed to Valimail but don't see any DMARC information in Reporting
DMARC data comes from inboxes receiving your mail. They aggregate this data and send it every 24 hours. If you have just started with Valimail, you may not ...
Wed, 3 Nov, 2021 at 10:05 AM
DMARC Alignment
In order for an email to pass DMARC, it must pass authentication with either SPF or DKIM in an aligned way. Alignment is defined as follows: SPF In ord...
Mon, 29 Jun, 2020 at 10:13 AM
DMARC - Strict vs Relaxed alignment
The DMARC standard enables a domain owner to allow relaxed alignment or to require strict alignment. Note that there is no discernible increase in protectio...
Mon, 29 Jun, 2020 at 11:22 AM