Free DMARC Weekly Digests by Postmark vs.
Glockapps in 2026

Postmark grouped Microsoft 365 and Google Workspace cleanly enough in the weekly email, and it showed SendGrid and Mailchimp among the top sources on the primary domain. The limits showed up on the marketing subdomain: the unknown sender stayed generic until we matched IPs manually, and the forwarded mail with SPF failure appeared as a failing authentication row without enough context for a non-specialist owner.

GlockApps gave us more room to work. Microsoft 365, Google Workspace, SendGrid, and Mailchimp were easier to separate in the dashboard, and the DKIM pass on a subdomain was easier to explain because we could drill into the domain and sender rows. The broader scope also brought blocklist and blacklist checks into the same operational routine, which was useful but added more settings to review.

Postmark's onboarding was the fastest of the test. We added the parked domain first, copied the DMARC TXT record, verified DNS, and waited for the first weekly email; the primary domain and marketing subdomain felt the same except for stakeholder review. The unknown sender still required a spreadsheet step because the digest gave us the source clue but not enough classification workflow.

GlockApps took longer because we had to decide which monitors, reports, and notifications mattered for each of the three domains. Once data arrived, the dashboard helped more: the forwarded SPF failure had clearer context, and the unknown sender was easier to compare against SendGrid, Mailchimp, Microsoft 365, and Google Workspace rows. The tradeoff was more setup time before the account felt tidy.

Postmark's DNS handoff was simple: copy the TXT record, verify the domain, and wait for the weekly report. That works for a single-domain SMB or a parked domain, but it left little room for escalation when we wanted to explain the visible-from mismatch to a business owner. The free-product support expectation felt mostly self-serve unless the organization already had a broader Postmark relationship.

GlockApps had more help material for monitoring setup, overage limits, users, and report interpretation. During the test, that helped us explain why the support desk sender passed DKIM but not SPF domain matching on one route. The enterprise path was more visible than Postmark's free product, although we would still confirm response times, escalation handling, and onboarding scope before using it for a high-volume enforcement project.

Postmark worked best for the parked domain and for SMB-style oversight of the primary domain. It did not give us account separation, client grouping, recurring report controls beyond the weekly email, or handoff notes that an MSP could reuse with clients. For enterprise work, it also lacked the policy movement workspace we wanted when moving toward quarantine or reject.

GlockApps handled domain grouping and recurring reports better, and the broader monitoring made sense for a marketing or deliverability operator. It was still not a clean MSP handoff workflow in our test because we had to write our own owner notes for Microsoft 365, Google Workspace, SendGrid, Mailchimp, and the support desk sender. For enterprise teams, the main question is whether the broader deliverability console matches the DMARC enforcement process.