Free DMARC Weekly Digests by Postmark vs.
Agari Brand Protection in 2026

In Postmark, Microsoft 365 and Google Workspace were easy enough to recognize in the weekly email, and the SPF pass and DKIM pass cases were reported cleanly. SendGrid and Mailchimp appeared as sources, but the digest format forced us to infer ownership from source names and IP counts, and the unknown sender needed a manual note outside the product. The forwarded mail case with SPF failure was visible as a failure pattern, but the digest did not explain the forwarding path or suggest a policy-safe next step.

Agari gave us a fuller source inventory across Microsoft 365, Google Workspace, SendGrid, Mailchimp, and the support desk sender, with clearer separation between approved sender, suspicious sender, and unresolved source. The DKIM pass on a subdomain was easier to review because the policy and domain hierarchy were visible together. The unauthorized spoof sample moved into a more useful investigation path, with stronger evidence for enforcement planning.

We configured the primary domain quickly, then added the marketing subdomain and parked domain as separate checks where the free workflow felt less natural. Finding the unknown sender meant scanning the weekly digest and keeping our own notes, and explaining the forwarded SPF failure required DMARC knowledge outside the product. For a small sender, that is acceptable; for a team with recurring investigations, it becomes repetitive.

Agari took longer to get oriented because the setup expected domain grouping, sender approval decisions, and policy intent up front. Once configured, the unknown sender was easier to isolate, and the forwarded SPF failure had enough context for us to explain why SPF failed while DMARC did not automatically mean spoofing. The tradeoff is that casual users need a guided handoff to avoid misreading policy screens.

During setup, Postmark gave us enough information to create the DMARC record and wait for the weekly digest, but the support model did not feel built for live DNS handoff. When the marketing subdomain needed a separate record and the parked domain had no legitimate mail, we had to decide the right policy path ourselves. Escalation was not part of the free workflow we tested.

Agari had a more formal onboarding path, which helped when we needed to explain Microsoft 365, Google Workspace, SendGrid, Mailchimp, and the support desk sender as approved sources. DNS handoff and enforcement movement were better suited to a project plan than an ad hoc operator note. The tradeoff was speed: a small issue, such as the unknown sender label, felt heavier than it needed to.

Postmark was strongest for an SMB or technical founder watching one domain with low operational overhead. Account separation, client grouping, and recurring client reports were not part of the free workflow, so an MSP would need outside process for handoff notes and monthly evidence. The parked domain was easy to monitor, but policy movement still depended on the operator.

Agari fit a larger organization with separate owners for messaging, security, and DNS. Domain grouping and recurring reporting were more practical for an enterprise program than for a small team, and client handoff would work only when the operator had enough process around each account. For MSP use, the workflow felt powerful but heavier than the recurring-report cadence many small clients expect.