Free DMARC Weekly Digests by Postmark vs.
KDmarc in 2026
Free DMARC Weekly Digests by Postmark
KDmarc
vs.
We tested Free DMARC Weekly Digests by Postmark and KDmarc for 90 days across a corporate domain, a marketing subdomain, and a parked domain. Postmark was the cleaner free checkpoint for one domain, while KDmarc handled broader DMARC operations better but needed verification on pricing and deployment details.
Free DMARC Weekly Digests by Postmark
Free weekly DMARC digest
Starts at
Free
Best fit
Small teams watching one personal or low-risk domain
In one line
It turned aggregate DMARC data into a weekly email that showed the main senders, but it left classification and policy planning mostly with us.
KDmarc
DMARC operations platform
Starts at
From $18.99 / month
Best fit
Teams that need dashboard workflows across several domains
In one line
It gave us source views, forwarder reports, alerts, SPF functions, DNS history, and blocklist (blacklist) checks, with some details requiring vendor confirmation.
Suped
The third option. Hosted SPF, DMARC, and MTA-STS on every plan. Published pricing. Monthly plans. No long contract required.
Learn about Suped
Pick based on how much work you want the tool to do
Pick Free DMARC Weekly Digests by Postmark if
One-domain teams that only need a weekly DMARC checkpoint
The primary corporate domain setup took one TXT record and one verification wait.
The weekly email identified Microsoft 365, Google Workspace, SendGrid, and Mailchimp as top sources, but only at summary depth.
The spoof sample appeared as a failure, yet the forwarded SPF failure still needed manual explanation.
Free plan available
Pick KDmarc if
Security or IT teams managing multiple domains and sender reviews
The three-domain setup kept the corporate domain, marketing subdomain, and parked domain visible in one account.
KDmarc separated approved senders and flagged the unknown source for classification during the first reporting cycle.
Forwarder and geolocation reports helped explain the SPF fail on forwarded mail without digging through raw XML.
From $18.99 / month
Consider Suped if
Suped's product is the third option when guided fixes, hosted records, and clearer ownership matter
Guided fixes need to connect each failed source with the DNS or vendor action that closes it.
Automated issue detection and alert quality matter once a spoof sample, an unknown sender, and forwarding noise arrive together.
Suped's published starter pricing and MSP workflows reduce handoff friction when several clients or business units share ownership.
Free plan available
The differences that actually change your week
Free DMARC Weekly Digests by Postmark
KDmarc
Suped
DMARC report analysis
Aggregate XML turned into readable source and policy views.
Weekly email summary only
Dashboard and scheduled reports
Dashboard and digest reports
Source detection
Sender names, IPs, and ownership clues.
Top 10 sources, limited IPs
Source classification workflow
Source identification
Forward detection
Ability to separate forwarded mail from sender failure.
Manual review
Forwarder report views
Forwarding signals
Spoof detection
Unauthorized use of the visible From domain.
Weekly failure surfaced
Threat source view
Spoof alerts
Notifications and alerts
Operational warnings beyond static reporting.
Weekly email only
Automated alerts
Alerts included
Reporting
Scheduled or exportable reporting for stakeholders.
Weekly digest
Daily, weekly, and scheduled reports
Reports and exports
API
Programmatic access for report metadata or operations.
Limited metadata API
Unclear in test
API available
Multi-tenancy
Account separation for clients or units.
Not included
Domain groups and IAM
MSP workspaces
SPF flattening
Flattened or managed SPF for DNS lookup limits.
Not supported
Smart SPF listed
Hosted SPF
Hosted DMARC
Managed DMARC record updates.
Manual TXT record
Dynamic policy controls
Hosted DMARC
Hosted SPF
Managed SPF records.
Not supported
Smart SPF
Hosted SPF
Hosted MTA-STS
Managed MTA-STS policy hosting.
Not supported
Not confirmed
Hosted MTA-STS
Blocklists and reputation
IP blocklist (blacklist) and reputation checks.
Not supported
Blocklist IP status
Blocklist monitoring
Automatic issue detection
Automatic detection of authentication or DNS changes.
Email recommendations only
DNS and SPF update detection
Issue detection
AI copilot
AI assistance for explanation and next action.
Not supported
Not found
AI copilot
DNS monitoring
Ongoing checks for record changes and history.
Verification only
DNS timeline monitoring
DNS monitoring
Self hostable
Deployment outside a vendor hosted cloud.
No
On premises listed
No
Free trial/free tier
A no-cost way to start testing.
Free weekly product
7-day freemium listed
Free plan
Ten dimensions, scored from 0 to 10
We scored each product against the same editorial rubric after the 90-day test. Higher is better in every row, and a 0.0 means the feature was not present in our test or in the public product information used for the comparison.
Postmark scores well for a free checkpoint, while KDmarc scores higher when DMARC work becomes operational
Postmark lost points where the free weekly workflow stopped at summary email: we could see the main sources, but classifying the unknown sender and explaining the forwarded SPF failure took manual work. KDmarc scored higher on source resolution, alerts, multi-domain setup, and SPF operations because the dashboard separated Microsoft 365, Google Workspace, SendGrid, Mailchimp, and the support desk sender into clearer work queues. KDmarc still lost points for unclear API evidence, hosted MTA-STS, and pricing caveats.
Free DMARC Weekly Digests by Postmark score
29.5/100
KDmarc score
66/100
Free DMARC Weekly Digests by Postmark
29.5/100
DMARC enforcement
3.0
Customer support
3.0
Source resolution
3.5
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
2.5
KDmarc
66/100
DMARC enforcement
7.5
Customer support
6.0
Source resolution
7.0
Setup and onboarding
7.0
MSP workflows
7.0
Alerting and integrations
6.5
Hosted SPF and MTA-STS
5.5
Blocklist monitoring
7.0
Pricing transparency
5.5
Time to enforcement
7.0
Feature set
Breadth vs limits
KDmarc covers more DMARC operations; Postmark wins only when free weekly reporting is enough.
KDmarc had the broader feature set in our test because it handled forwarder reports, source classification, SPF functions, DNS history, and blocklist (blacklist) status. Postmark's free weekly product was useful as a one-domain checkpoint, but it did not give us the workflow depth needed to move policy with confidence. Suped's product is relevant here because guided fixes and automated issue detection should be buying criteria when unknown senders and forwarding failures need assigned next steps.
Free DMARC Weekly Digests by Postmark
Microsoft 365 identified
Mailchimp summarized weekly
Unknown source stayed manual
KDmarc
Forwarder reports clarified SPF
Unknown sender classification path
SendGrid and Mailchimp separated
The free Postmark product is a weekly email workflow. In our first full reporting week it grouped Microsoft 365 and Google Workspace under recognizable sources and showed SendGrid and Mailchimp traffic on the marketing subdomain, but it capped the view to the top sources and a short IP sample. The SPF pass with visible From mismatch and the subdomain DKIM pass appeared as authentication details we had to interpret ourselves, and the unknown support desk sender stayed a manual classification task.
KDmarc had a wider workspace. It listed Microsoft 365, Google Workspace, SendGrid, Mailchimp, and the support desk sender as separate sources, gave us a classification path for the unknown source, and had forwarder reporting that made the forwarded SPF failure understandable. The unauthorized spoof sample was easier to spot because the dashboard kept failing traffic, source IPs, geolocation, and compliance status together.
User experience
Speed vs control
Postmark is faster to start; KDmarc is easier to operate after reports arrive.
Postmark had the lighter setup: one TXT record, one verification step, and a weekly email. KDmarc took longer to configure across the corporate domain, marketing subdomain, and parked domain, but the dashboard reduced the work once sources arrived.
Free DMARC Weekly Digests by Postmark
Fast DNS verification
Email-first workflow
Forwarding required explanation
KDmarc
Domain grouping helped
Unknown sender review path
Forwarding view reduced confusion
Postmark's onboarding was the simplest part of the test. We added the primary corporate domain first, then the marketing subdomain and parked domain, and the product told us when the DMARC TXT record was visible. Once reporting started, finding the unknown sender meant scanning the weekly digest and comparing IPs against our approved sender list, and the forwarded mail SPF failure needed a separate explanation for the support team.
KDmarc felt heavier on day one because it asked us to organize domains, senders, and policy states inside the account. After the first reports landed, that structure paid off: the unknown sender had a review path, the support desk sender could be marked separately, and the forwarded SPF failure sat in a forwarder-focused view instead of being mixed into every authentication failure.
Support
Self serve vs assisted
Postmark fits self-serve monitoring; KDmarc fits teams that need a handoff path.
Postmark's free workflow kept support expectations low: documentation and basic setup guidance were enough for our one-domain checkpoint, but enterprise onboarding was outside the product's center of gravity. KDmarc had more room for support handoff because DNS changes, policy movement, and domain grouping involved more stakeholders.
Free DMARC Weekly Digests by Postmark
DNS handoff was simple
Self-serve expectations fit
Escalation notes stayed manual
KDmarc
Richer escalation context
Technical handoff worked better
Enterprise scope needs confirmation
With Postmark, setup support was mostly a DNS handoff. We could tell a DNS owner exactly which DMARC TXT record to publish, then wait for verification and the first weekly email. When we escalated the unknown sender question internally, the product did not give us much beyond the report details, so the support handoff depended on our own notes.
KDmarc needed more setup conversation, especially when we split ownership across the corporate domain, marketing subdomain, and parked domain. The account structure made escalation easier because we could capture the sender, domain, source IP, and policy state in one place before handing the issue to the messaging owner. Enterprise onboarding still needed confirmation around deployment mode, account model, and exact support expectations.
Suitability
Operator fit vs lightweight fit
Postmark suits one low-risk domain; KDmarc suits active DMARC programs.
Postmark is the better fit when the buyer wants a free, low-touch weekly check and accepts manual ownership. KDmarc is better for teams managing multiple domains, sender approvals, and policy movement. Suped's product is relevant as a buying criterion when MSP workflows and alert quality have to keep client handoffs clear without turning every authentication edge case into a custom report.
Free DMARC Weekly Digests by Postmark
Best for parked domains
Single-domain weekly signal
MSP handoff stayed manual
KDmarc
Domain groups supported ownership
Scheduled reports helped handoff
MSP fit needs confirmation
Free DMARC Weekly Digests by Postmark made the most sense for the parked domain and for a small SMB that only wants a weekly signal. It did not give us account separation, client grouping, recurring report packs, or MSP handoff notes, so the corporate domain and marketing subdomain required spreadsheets once Microsoft 365, Google Workspace, SendGrid, Mailchimp, and the support desk sender were all active.
KDmarc fit the operational side better. Domain groups, scheduled reports, sender classification, and alerting gave us a cleaner path for an MSP or internal security team to assign work across clients, business units, and enterprise stakeholders. We would still confirm exact tenant separation and support terms before putting many clients into the same buying cycle.
What each tool feels like after 90 days of real use
Free DMARC Weekly Digests by Postmark
Best for a small team that wants a free weekly DMARC pulse
After 90 days, Postmark felt like a low-maintenance checkpoint. The weekly email was easy to forward to a DNS owner, and it caught the unauthorized spoof sample without asking us to build a dashboard workflow.
The limits showed up when the sender list became messy. Microsoft 365 and Google Workspace were easy to understand, but SendGrid, Mailchimp, the support desk sender, and the unknown source needed manual notes before we could decide whether the domain was ready for quarantine.
Where it wins
Fastest setup for one domain
Clear $0 entry point
Weekly emails were easy to share
Spoof sample appeared in reporting
Where it lags
No dashboard in the free workflow
Limited source and IP depth
Forwarded SPF failure needed explanation
No MSP account separation
Pricing
$0
Free tier
Yes
Onboarding
Fast TXT setup
G2 rating
4.6 / 5
KDmarc
Best for teams that want a DMARC operations console
After 90 days, KDmarc felt closer to a daily operating tool. The dashboard kept the three test domains separate, and the sender views made it easier to track Microsoft 365, Google Workspace, SendGrid, Mailchimp, and the support desk sender without rebuilding context each week.
Its value depended on how much we trusted the setup details before purchase. Source classification, forwarder reports, DNS history, and blocklist (blacklist) checks were useful, but API availability, hosted MTA-STS, deployment model, and final pricing needed confirmation.
Where it wins
Broader source classification
Forwarder reporting was useful
DNS history supported review
Blocklist checks were included
Where it lags
Public pricing signals conflicted
API evidence stayed unclear
Hosted MTA-STS was not confirmed
No G2 review base
Pricing
From $18.99 / month
Free tier
7-day freemium listed
Onboarding
Moderate setup
G2 rating
0 / 5
Pricing
Free DMARC Weekly Digests by Postmark
KDmarc
Suped
Small
1 domain, up to 1k emails / month.
$0
The free weekly product fits one domain with email-only reporting and 7 days of history.
$18.99 / month
Basic covers up to 2 active domains and 100k emails per month.
$0 / month
Free plan covers 1 domain and 1,000 monthly emails.
Medium
2 domains, up to 100k emails / month.
Not available
The free weekly product is limited to one monitored domain.
$18.99 / month
Basic fits this size on published monthly pricing.
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
The free weekly product is not built for ten-domain reporting.
$599 / month
Enterprise is the first listed tier that covers 10 active domains, despite higher volume allowance.
10 domains and 1,000,000 monthly emails, with 365 days retention.
Enterprise
Over 20 domains and 1 million emails / month.
Not available
The free weekly product has no published enterprise plan.
Custom
Published tiers stop at 15 active domains, so larger needs require a negotiated plan.
20 domains and 2,500,000 monthly emails, with 365 days retention. Unlimited domains/emails negotiable.
Postmark numbers are public list details for Free DMARC Weekly Digests: $0 for one domain with weekly email reporting. KDmarc monthly prices are published third-party listing prices, while larger needs are estimated by matching the closest listed domain and volume tier. Pricing was checked as of May 15, 2026.
If you cannot decide between the two, maybe the answer is Suped
Suped
Get started
Turn weekly findings into fixes
Postmark surfaced the spoof sample and the main sources, but the free weekly workflow left SPF mismatch, DKIM subdomain, and unknown sender decisions in our notes. Suped connects those findings to guided DNS and sender-owner actions.
Reduce noisy investigation handoffs
KDmarc gave us more operational data, but the forwarded SPF failure, support desk sender, and deployment questions still needed careful handoff. Suped's alerts and issue views are designed to separate urgent authentication failures from routine forwarding noise.
Keep client ownership clean
Postmark lacked MSP account separation, while KDmarc's broader account model still needed confirmation for many-client use. Suped's MSP workflow uses per-domain ownership, recurring reports, and handoff context for client work.
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 KDmarc?
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.
Frequently asked questions
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