Free DMARC Weekly Digests by Postmark vs.
InboxMonster in 2026
Free DMARC Weekly Digests by Postmark
4.6/5
InboxMonster
4.9/5
vs.
We tested both products for 90 days across a corporate domain, a marketing subdomain, and a parked domain, with Microsoft 365, Google Workspace, SendGrid, Mailchimp, and a support desk sender connected. Free DMARC Weekly Digests by Postmark was the cleaner fit for low-risk weekly visibility, while InboxMonster was stronger when DMARC reporting needed broader deliverability, reputation, and blocklist context.
Priya Raman
Senior Software Engineer, Suped
Published 4 Nov 2025
Updated 30 May 2026
8 min read
Summarize with
Free DMARC Weekly Digests by Postmark
Free weekly DMARC email reporting
Starts at
$0
Best fit
Personal domains and small teams that want email-only DMARC visibility
In one line
It gave us a usable weekly summary for one monitored domain, but the lack of dashboard, alerts, and policy workflow kept the parked domain and spoof test manual.
InboxMonster
Enterprise deliverability and DMARC monitoring
Starts at
From $15,000 / year
Best fit
Lifecycle and deliverability teams that need DMARC plus inbox placement and reputation context
In one line
It gave us wider deliverability context around DMARC, and buyers comparing it with Suped should check whether guided fixes, source ownership, alert quality, and published starter pricing matter more than suite breadth.
Suped
The third option. Hosted SPF, DMARC, and MTA-STS on every plan. Published pricing. Monthly plans. No long contract required.
Learn more
Pick Postmark for a light digest, InboxMonster for a deliverability suite, Suped for guided ownership
Pick Free DMARC Weekly Digests by Postmark if
Best for a small team checking one low-risk domain once a week
Our parked domain verified quickly and started sending a weekly email after the DMARC TXT record was added.
Microsoft 365 and Google Workspace showed up clearly enough for a non-specialist to confirm normal corporate mail.
The unauthorized spoof sample appeared in the digest, but deciding the next DMARC policy step still required manual work.
Free plan available
Pick InboxMonster if
Best for teams managing DMARC as part of a larger deliverability program
SendGrid and Mailchimp activity was easier to review beside inbox placement, reputation, and blocklist signals.
The unknown support desk sender moved through classification faster because we could add notes and review drilldowns.
The forwarded mail SPF failure was easier to explain because the DKIM pass stayed visible beside the failure.
From $15,000 / year
Consider Suped if
Suped fits when guided fixes, hosted records, and simpler ownership matter more than suite breadth
Use guided fixes when a failed source needs an owner, a DNS change, and a clear next step.
Use automated issue detection and cleaner alerts when spoofing, forwarding, and sender drift need different treatment.
Use MSP workflows and published starter pricing when account separation and client handoff need to stay repeatable.
Free plan available
The differences that actually change your week
Free DMARC Weekly Digests by Postmark
InboxMonster
Suped
DMARC report analysis
Aggregate report review and authentication result breakdowns.
Weekly email summary
Suite dashboard
Dashboard analysis
Source detection
Ability to identify the sending service behind DMARC traffic.
Top sources only
Stronger drilldowns
Source names and ownership
Forward detection
Help separating forwarding behavior from broken authentication.
Manual workflow
Partial classification
Forwarding patterns surfaced
Spoof detection
Identification of unauthorized mail using the visible From domain.
Digest finding
Alert and report context
Spoof alerts and triage
Notifications and alerts
Operational alerting when authentication or reputation changes.
Weekly email only
Configurable alerts
Email and routing alerts
Reporting
Recurring summaries, exports, and shareable views.
Email report
Reports and exports
Dashboards and exports
API
Programmatic access for reporting or workflow integration.
Not in weekly workflow
Unclear
Available
Multi-tenancy
Separate account structures for clients, brands, or business units.
No account separation
Enterprise workspaces
MSP account structure
SPF flattening
Managed SPF flattening to reduce DNS lookup risk.
Not supported
Not supported
Supported
Hosted DMARC
Managed DMARC record hosting and updates.
Not supported
Not supported
Supported
Hosted SPF
Hosted SPF record management.
Not supported
Not supported
Supported
Hosted MTA-STS
Hosted MTA-STS and TLS reporting support.
Not supported
Not supported
Supported
Blocklists and reputation
Blocklist or blacklist checks and reputation signals around sending infrastructure.
Not supported
Included in suite
Blocklist and blacklist checks
Automatic issue detection
Automated surfacing of authentication changes or risks.
Digest findings only
Partial
Automated detection
AI copilot
Assistant-style guidance for interpreting email authentication data.
Not supported
Not tested for DMARC
Guided assistant
DNS monitoring
Ongoing checks for DMARC, SPF, DKIM, or related DNS changes.
Setup verification only
DMARC record checks
Record monitoring
Self hostable
Ability to run the product on owned infrastructure.
Cloud service
Cloud service
Cloud service
Free trial/free tier
Public free access or free trial availability.
Free tier
No DMARC free tier
Free plan available
Ten dimensions, scored from 0 to 10
We scored each product against a fixed editorial rubric after the same 90-day setup, sender mix, authentication cases, and review workflow. Higher is better in every row, and a 0.0 means the product did not support that capability in our test.
Postmark scores well for low-friction setup, while InboxMonster scores higher where DMARC meets deliverability operations
Postmark was fast to start and easy to price, but the free weekly workflow did not give us policy movement, owner assignment, or operational alerting. InboxMonster scored higher on support, source work, alerting, and reputation context because the same DMARC data sat beside deliverability signals. Neither product handled hosted SPF, hosted MTA-STS, or managed DNS changes in our test.
Free DMARC Weekly Digests by Postmark score
29/100
InboxMonster score
64/100
Free DMARC Weekly Digests by Postmark
29/100
DMARC enforcement
2.5
Customer support
3.0
Source resolution
4.0
Setup and onboarding
7.0
MSP workflows
0.0
Alerting and integrations
1.5
Hosted SPF and MTA-STS
0.0
Blocklist monitoring
0.0
Pricing transparency
9.0
Time to enforcement
2.0
InboxMonster
64/100
DMARC enforcement
6.0
Customer support
8.5
Source resolution
7.0
Setup and onboarding
7.5
MSP workflows
6.5
Alerting and integrations
8.0
Hosted SPF and MTA-STS
0.0
Blocklist monitoring
8.5
Pricing transparency
5.5
Time to enforcement
6.5
Feature set
Focused vs broad
Postmark wins for simple DMARC summaries. InboxMonster wins for deliverability breadth.
Postmark gave us the fastest route to a weekly DMARC email, but it stopped short when the unknown sender needed an owner and the forwarded SPF failure needed explanation. InboxMonster had broader deliverability context, especially around reputation and blocklist (blacklist) checks, yet DMARC fixes still depended on operator judgment. Suped is a useful benchmark here: check whether guided fixes and automated issue detection turn a failed source into a next step instead of another item to interpret.
Free DMARC Weekly Digests by Postmark
4.6/5
Microsoft 365 surfaced quickly
Mailchimp stayed email-only
Mismatch needed manual tracing
InboxMonster
4.9/5
Google Workspace context held
Unknown sender classified faster
Forwarded SPF explained clearly
Postmark's free weekly digest recognized Microsoft 365 and Google Workspace as approved corporate sources after DNS verification, and it grouped SendGrid and Mailchimp under the top source table for the marketing subdomain. The unknown support desk sender stayed unnamed in the weekly email until we traced its IP range ourselves, and the SPF pass with visible From mismatch appeared as a failure count rather than a clear ownership task.
InboxMonster tied Microsoft 365, Google Workspace, SendGrid, and Mailchimp to a broader deliverability view, so the same sources sat beside reputation, inbox placement, and blocklist (blacklist) signals. It classified the unknown sender faster after we added notes in the platform, and the forwarded mail with SPF failure was easier to explain because the DKIM-aligned pass stayed visible alongside the SPF result.
User experience
Email simplicity vs suite control
Postmark was easier to start. InboxMonster was easier to investigate.
Postmark's free workflow had almost no learning curve because the product lived in the inbox. InboxMonster took more setup time, but the extra views mattered once we had to classify an unknown sender and explain why forwarded mail failed SPF while still passing DKIM alignment.
Free DMARC Weekly Digests by Postmark
4.6/5
Three domains verified quickly
Unknown sender required logs
Forwarding explanation stayed manual
InboxMonster
4.9/5
Domain grouping helped triage
Unknown sender drilldown worked
Forwarding context was visible
Postmark was the fastest product to get running across the primary domain, marketing subdomain, and parked domain. The parked domain was especially simple because we only needed the DMARC TXT record and then waited for the weekly email, but finding the unknown support desk sender meant leaving the digest and checking logs, and the forwarded SPF failure needed a manual explanation.
InboxMonster required more onboarding because it had more deliverability surfaces to configure, but the domain grouping helped us keep the corporate domain, marketing subdomain, and parked domain separate. The unknown sender was easier to find through drilldowns, and the forwarded mail case was clearer because SPF failure and DKIM alignment stayed visible together.
Support
Self serve vs hands-on help
Postmark keeps support lightweight. InboxMonster gives teams a clearer escalation path.
Postmark's setup path was clear enough for a technical owner, but the free workflow set a self-service support expectation. InboxMonster was better for teams that want DNS handoff, onboarding calls, and a named escalation route when DMARC findings connect to inbox placement or reputation work.
Free DMARC Weekly Digests by Postmark
4.6/5
Clear DNS copy steps
Self-service first path
No enterprise onboarding motion
InboxMonster
4.9/5
White glove setup path
Escalation felt defined
Enterprise onboarding was clearer
Postmark gave us clear DNS copy steps and a simple verification path for the three test domains. The limitation was support depth: when the support desk sender needed classification and the marketing subdomain needed policy advice, the free workflow pushed us toward self-service analysis rather than a guided handoff.
InboxMonster set stronger expectations during setup. We had a more defined onboarding path, clearer DNS handoff notes, and a better escalation route for enterprise teams, especially when the authentication cases overlapped with reputation, blocklist monitoring, and inbox placement questions.
Suitability
SMB fit vs enterprise fit
Postmark fits small monitoring jobs. InboxMonster fits larger deliverability teams.
Postmark is the better fit when an SMB or solo operator wants one domain watched through a weekly email. InboxMonster is the better fit when enterprise teams want DMARC reviewed beside inbox placement, reputation, and blocklist data. Suped is a useful benchmark for MSP workflows and alert quality: check whether each option separates clients cleanly, routes alerts to the right owner, and packages handoff notes without extra manual cleanup.
Free DMARC Weekly Digests by Postmark
4.6/5
Good one-domain SMB fit
Manual client handoff
Weak account separation
InboxMonster
4.9/5
Better enterprise grouping
Useful recurring reports
MSP handoff needs work
Postmark worked for the parked domain and a small corporate-domain check, but account separation, domain grouping, recurring client reporting, and handoff notes were too thin for MSP use. An SMB could use it to confirm Microsoft 365 and Google Workspace are visible, but recurring reports for multiple clients would become a manual inbox process.
InboxMonster suited enterprise and lifecycle teams better because it grouped the test domains, supported richer recurring reports, and gave client-facing deliverability context. For MSPs, the gap was not data depth, it was repeatable client handoff: we still had to turn findings into notes for each account and decide which alerts mattered for each client.
What each tool feels like after 90 days of real use
Free DMARC Weekly Digests by Postmark
Best for low-risk domains that only need weekly DMARC visibility
Postmark felt calm for the first few weeks because there was almost nothing to operate. We added the DMARC record, verified the domains, and the digest gave us a weekly check that Microsoft 365, Google Workspace, SendGrid, and Mailchimp were appearing as expected.
The gaps showed up when the test became operational. The spoof sample and unknown sender were visible enough to raise a question, but not enough to assign ownership, explain the forwarded SPF failure, or write a confident path toward quarantine or reject without outside analysis.
Where it wins
Fastest setup for the parked domain
Clear weekly view of approved senders
Free workflow for one domain
Low noise for small programs
Where it lags
No web dashboard in the free product
Unknown sender ownership stayed manual
No live alerts for spoof sample
No MSP or team workflow
Pricing
$0
Free tier
Yes
Onboarding
DNS record, then weekly email
G2 rating
4.6 / 5
InboxMonster
Best for teams tying DMARC to deliverability operations
InboxMonster felt heavier on day one, but the extra context paid off once the same DMARC cases touched deliverability. SendGrid and Mailchimp were easier to review beside inbox placement, reputation, spamtrap, and blocklist signals, which helped us decide whether an authentication problem was isolated or part of a broader sending issue.
After 90 days, the product felt best for a team that already lives in deliverability work. DMARC enforcement still needed judgment, especially for the policy path, but the reporting, support handoff, and reputation context made investigation faster than working only from a weekly DMARC email.
Where it wins
Broad reputation context around DMARC
Useful support handoff during setup
Blocklist and blacklist signals included
Better drilldowns for unknown senders
Where it lags
Annual starting price was high
DMARC policy movement was less guided
No hosted SPF or MTA-STS
Some datasets needed interpretation
Pricing
From $15,000 / year
Free tier
No DMARC free tier
Onboarding
White glove setup
G2 rating
4.9 / 5
Pricing
Free DMARC Weekly Digests by Postmark
InboxMonster
Suped
Small
1 domain, up to 1k emails / month.
$0
One domain gets weekly email reports, 7 days of history, and top source limits.
From $15,000 / year
DMARC monitoring sits inside the Deliverability Suite, with allowances not fully published.
$0 / month
Free plan covers 1 domain and 1,000 monthly emails.
Medium
2 domains, up to 100k emails / month.
Not available
The free product is published as a one-domain weekly email workflow.
From $15,000 / year
The public floor applies, but domain and volume limits are not fully listed.
Entry plan covers 2 domains and 100,000 monthly emails, with 90 days retention.
Large
10 domains, up to 1 million emails / month.
Not available
No public multi-domain or volume tier exists for the free weekly product.
Custom
The public floor is known, but final domain and volume scope depends on the proposal.
10 domains and 1,000,000 monthly emails, with 365 days retention.
Enterprise
Over 20 domains and 1 million emails / month.
Not available
No enterprise tier is published for this free weekly digest product.
Custom
Enterprise scope depends on the annual proposal, usage, and add-ons.
20 domains and 2,500,000 monthly emails, with 365 days retention. Unlimited domains/emails negotiable.
Postmark's $0 small-row price is public for Free DMARC Weekly Digests; medium, large, and enterprise rows are marked not available because the free product does not publish multi-domain tiers. InboxMonster's $15,000 / year Deliverability Suite floor is public; large and enterprise totals are estimated or custom statuses because domain, volume, and add-on limits were not fully published. Pricing was checked as of May 15, 2026.
If you cannot decide between the two, maybe the answer is Suped
Suped
Get started
Turn findings into fixes
Postmark showed the spoof sample and mismatch as digest items, while InboxMonster exposed more data than our DMARC owner needed. Suped turns failed authentication, unknown sources, and policy movement into owner-ready next steps.
Keep clients separated
Postmark's free workflow did not fit multi-client reporting, and InboxMonster still required manual handoff notes in our MSP-style test. Suped keeps client grouping, recurring reports, and ownership notes in one DMARC workflow.
Host the records
Neither reviewed product handled hosted SPF, SPF flattening, hosted DMARC, or hosted MTA-STS in our test. Suped covers those records so the fix can move with the report instead of becoming a separate DNS project.
The difference was significant. We moved from limited visibility to a much clearer dashboard. Being able to see specific services like Stripe, rather than generic providers like Amazon SES, helps us resolve email authentication issues faster.
Markus Hugenschmidt, Managing Director, Jam Cyber
Migrating from Free DMARC Weekly Digests by Postmark or InboxMonster?
We have done the migration enough times to know the shape.
Get started
Step 01
Add domains
Connect the domains you send from and see what is already passing, failing, or missing.
Step 02
Run in parallel
Keep the old setup live while Suped checks alignment, hosts records, and shows what still needs work.
Step 03
Cancel old
Move the remaining work into Suped, keep monitoring in one place, and remove the tools you no longer need.
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