DMARC Alignment Explained, The Shield Against Email Impersonation

Where the safeguarding of email communications is ever-critical, the term 'DMARC Alignment' frequently surfaces. But what does it truly entail, and why is it fundamental for protecting your organisation's email traffic?

At its core, DMARC Alignment mandates that the domain behind the scenes of an email (verifiable by SPF or DKIM standards) must correspond with the domain the recipient sees in the 'From' address. This alignment is crucial in the fight against email fraud and impersonation.

SPF and DKIM protocols are well-established in their roles of authenticating emails, yet they do not inherently address the alignment with the 'From' address—the very address that stands as the face of an email's credibility to the recipient.

Herein lies the problem: without alignment, bad actors have a loophole to exploit, masquerading as legitimate entities, which DMARC aims to close.

The crux of DMARC is its ability to link the authentication results of SPF and DKIM to the actual policy enforcement for emails that fail to authenticate. For a successful DMARC verification, the domain specified in the 'From' header must match the domains validated by SPF and DKIM checks. It's a simple yet powerful requirement: alignment equals authentication success; misalignment equals failure.

To establish DMARC alignment, each third-party vendor or email service provider that sends emails on your behalf must be meticulously configured to ensure they meet this criterion. This involves a tailored approach to each source, navigating the peculiarities of their specific alignment settings. While some vendors may bypass DMARC prerequisites to ease their solution's adoption, it's crucial to not let this apparent simplicity compromise your email security stance.

The technical essence of achieving DMARC alignment may involve steps such as

  1. Reviewing the SPF and DKIM records in your DNS configuration.
  2. Ensuring that the 'From' domain in your email headers matches the domains specified in these records.
  3. Collaborating with vendors to adjust their settings to align with your DMARC policies.

Your endgame is not just partial alignment but to aim for total congruence across all email communication channels. The more aligned your emails are, the more robust your DMARC policy can be, transitioning from 'none' to 'quarantine' and finally to the ultimate goal of 'reject' for non-aligned emails.


DMARC Alignment is not merely a technical detail; it's a strategic fortress in your cybersecurity armoury. By achieving and maintaining alignment, your organisation stands tall against the tide of email impersonation and fraud.

The process may be intricate, involving multiple steps and coordination with various vendors, but it's an endeavour that fortifies the trustworthiness of every email sent under your domain's banner.