OnDMARC vs.
Postmastery in 2026
OnDMARC
Postmastery
vs.
We tested OnDMARC and Postmastery 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. OnDMARC gave us the clearer enforcement path and richer hosted authentication controls. Postmastery felt more natural for deliverability operators who want consulting-led interpretation and recurring reporting rather than a product-led DMARC workflow.
OnDMARC
Enterprise DMARC enforcement
Starts at
From $9 / month
Best fit
Security teams moving multiple domains to quarantine or reject
In one line
OnDMARC combined DMARC analysis, Dynamic SPF, hosted MTA-STS, alerts, and policy guidance into the most complete enforcement workflow in our test.
Postmastery
Deliverability-led DMARC reporting
Starts at
Not publicly listed
Best fit
Email operations teams that value deliverability review and consultant interpretation
In one line
Postmastery helped us interpret sending behavior and recurring report trends, but it required more manual classification and more sales handoff for pricing.
Suped
The third option. Hosted SPF, DMARC, and MTA-STS on every plan. Published pricing. Monthly plans. No long contract required.
Learn about Suped
Choose OnDMARC for enforcement depth, Postmastery for operator-led review
Pick OnDMARC if
Best for security teams that need a managed path to enforcement
Moved the primary corporate domain to a defendable quarantine plan after we confirmed Microsoft 365 and Google Workspace alignment.
Handled the forwarded mail SPF failure cleanly by separating SPF failure from DKIM alignment and receiver forwarding behavior.
Dynamic SPF and hosted MTA-STS reduced DNS change work when SendGrid and Mailchimp needed record updates.
From $9 / month
Pick Postmastery if
Best for deliverability teams that want human review around DMARC data
Recurring reports made the marketing subdomain easier to review after SendGrid and Mailchimp volume changed week by week.
Consulting-style notes helped explain the SPF visible from mismatch without overreacting to every failed source.
Unknown sender classification took more manual checking, but the handoff format suited deliverability operations.
Not publicly listed
Consider Suped if
A third option when guided fixes, hosted records, and simpler ownership matter
Guided fixes help owners move from a detected source to the exact SPF, DKIM, or DMARC action needed.
Automated issue detection and cleaner alerts matter when forwarded mail, spoof samples, and unknown senders land together.
MSP workflows and published starter pricing reduce handoff friction for teams managing several domains or clients.
Free plan available
The differences that actually change your week
OnDMARC
Postmastery
Suped
DMARC report analysis
Turns aggregate reports into domain, source, alignment, and policy views.
Strong report analysis with drilldowns by source and policy state
Reporting-focused analysis with more manual interpretation
Supported
Source detection
Identifies Microsoft 365, Google Workspace, ESPs, support tools, and unknown senders.
Good source mapping, unknown sender needed one manual owner decision
Supported, but classification felt more manual
Supported
Forward detection
Separates forwarded SPF failures from direct authentication failures.
Clear enough to avoid blocking forwarded mail
Supported in reports, less prominent in workflow
Supported
Spoof detection
Flags unauthorized mail using the domain without alignment.
Flagged the spoof sample quickly with policy impact
Detected in aggregate review, less operational alerting
Supported
Notifications and alerts
Sends useful alerts without turning routine report changes into noise.
Smart alerts, some tuning needed
Report-led notifications, manual workflow
Supported
Reporting
Exports, recurring summaries, and explainable progress reporting.
Good dashboards, exports less flexible than expected
Recurring deliverability reporting was a strength
Supported
API
Programmatic access for reporting and workflow integration.
REST API listed on public tiers
Not confirmed in our test
Supported
Multi-tenancy
Account separation, client grouping, and controlled user access.
Role-based access worked, domain grouping took effort
Good for consultant-led account separation
Supported
SPF flattening
Reduces SPF lookup pressure for domains with many senders.
Dynamic SPF was one of its clearest advantages
Not tested as a hosted feature
Supported
Hosted DMARC
Managed DMARC records or delegated DMARC change workflow.
Supported through Dynamic Services
Reporting only in our test
Supported
Hosted SPF
Hosted SPF record management for SPF changes.
Supported through Dynamic SPF
Not tested as a hosted feature
Supported
Hosted MTA-STS
Managed MTA-STS and TLS reporting workflow.
Supported through Dynamic Services
Not tested as a hosted feature
Supported
Blocklists and reputation
Blocklist or blacklist and reputation monitoring attached to domain work.
Radar and reputation signals available on higher tiers
Deliverability reputation review was part of the workflow
Supported
Automatic issue detection
Flags likely configuration or authentication issues without manual hunting.
Supported, but forensic auto-triage still felt limited
Manual workflow in our test
Supported
AI copilot
AI assistance for investigation, explanation, or recommended action.
Radar AI available on selected tiers
Not tested
Supported
DNS monitoring
Monitors DNS changes that affect authentication or delivery.
Supported through DNS history and related monitoring
Not confirmed in our test
Supported
Self hostable
Can be run by the buyer on their own infrastructure.
No
No
No
Free trial/free tier
A public free trial or free plan for evaluation.
14-day free trial
Not publicly listed
Free plan available
Ten dimensions, scored from 0 to 10
We scored each product against a fixed editorial rubric covering enforcement, support, source resolution, onboarding, MSP workflows, alerting, hosted records, blocklist and blacklist monitoring, pricing clarity, and time to enforcement. Higher is better in every row.
OnDMARC scored higher for enforcement tooling, while Postmastery held up in reporting-led review
OnDMARC scored ahead because it combined source drilldowns, hosted SPF, hosted MTA-STS, smart alerts, and a clearer path from monitor to quarantine. It handled the forwarded SPF failure and the unauthorized spoof sample with less ambiguity. Postmastery was useful when reviewing trends and deliverability context, but unknown sender classification, hosted record work, and enforcement planning required more manual handoff.
OnDMARC score
76.5/100
Postmastery score
49.5/100
OnDMARC
76.5/100
DMARC enforcement
8.5
Customer support
8.0
Source resolution
8.0
Setup and onboarding
8.0
MSP workflows
6.5
Alerting and integrations
7.0
Hosted SPF and MTA-STS
9.0
Blocklist monitoring
7.0
Pricing transparency
6.0
Time to enforcement
8.5
Postmastery
49.5/100
DMARC enforcement
5.5
Customer support
7.0
Source resolution
6.0
Setup and onboarding
6.0
MSP workflows
7.0
Alerting and integrations
4.5
Hosted SPF and MTA-STS
0.0
Blocklist monitoring
6.0
Pricing transparency
2.0
Time to enforcement
5.5
Feature set
Enforcement depth
OnDMARC has the deeper DMARC control plane. Postmastery has the steadier deliverability review workflow.
OnDMARC gave us more levers inside the product: Dynamic SPF, hosted MTA-STS, policy movement, alerting, and source drilldowns were all usable during the 90-day test. Postmastery was useful for interpreting reports, but teams should treat guided fixes and automated issue detection as buying criteria if they need owners to act without a specialist reviewing every finding.
OnDMARC
Microsoft 365 mapped fast
Dynamic SPF included
Mismatch case was clear
Postmastery
SendGrid trends reviewed
Mailchimp reporting was useful
Manual source classification
OnDMARC identified Microsoft 365 and Google Workspace as approved corporate sources quickly, then let us separate SendGrid, Mailchimp, and the support desk sender by domain and alignment state. The SPF pass with visible from mismatch was clear enough to classify as an alignment problem rather than a sending outage, and the DKIM pass on a subdomain was visible in the drilldown without forcing us to inspect raw XML.
Postmastery gave us a practical reporting view for SendGrid and Mailchimp trends, and its deliverability framing helped us explain why marketing traffic moved differently from corporate mail. The unknown sender needed more manual classification, and the forwarded mail SPF failure required us to write more of the explanation ourselves before handing it to the domain owner.
User experience
Control vs interpretation
OnDMARC made enforcement steps easier to find. Postmastery made report review feel familiar to deliverability teams.
OnDMARC had more screens, but the main enforcement workflow was easier to follow once the three test domains were live. Postmastery felt lighter at first, then slowed down when we had to classify the unknown sender and turn a forwarded SPF failure into a clear owner note.
OnDMARC
Three domains onboarded cleanly
Forwarding explanation was clear
DNS steps were visible
Postmastery
Weekly review felt natural
Unknown sender took work
Parked domain needed notes
OnDMARC onboarding worked best when we added the corporate domain first, then the marketing subdomain, then the parked domain. The DNS setup path showed what records needed attention, and the forwarded mail SPF failure was explained in a way that kept us from treating every SPF fail as a reject blocker.
Postmastery was comfortable for reviewing weekly patterns, especially after Mailchimp volume changed on the marketing subdomain. Finding the unknown sender took more navigation and outside context, and the parked domain spoof sample was visible, but less tightly connected to a policy movement workflow.
Support
Hands-on setup
OnDMARC had the clearer enterprise support path. Postmastery leaned on specialist review.
OnDMARC set clearer expectations around DNS handoff, escalation, and enterprise onboarding, especially when hosted records and policy changes were involved. Postmastery support was more consultative around deliverability interpretation, but product setup and pricing questions needed more direct follow-up.
OnDMARC
DNS handoff was specific
Escalation path was clearer
Enterprise onboarding fit
Postmastery
Deliverability review helped
Pricing needed follow-up
DNS ownership assumed
OnDMARC gave us a cleaner support path when the support desk sender passed DKIM but failed SPF alignment under the visible from domain. The handoff notes were specific enough for a DNS owner to update the record, and enterprise onboarding expectations were easier to map to SAML, role-based access, and quarterly review requirements.
Postmastery was helpful when we asked how the SendGrid and Mailchimp patterns should be interpreted for deliverability risk. The support model felt better suited to teams that already know who owns DNS, because escalation for hosted record changes and enforcement decisions was less product-led in our test.
Suitability
Enterprise fit vs operator fit
OnDMARC fits security-owned enforcement. Postmastery fits deliverability-owned reporting.
OnDMARC is the stronger fit when a security or IT team owns DMARC policy movement across corporate, marketing, and parked domains. Postmastery is a better fit when a deliverability team wants recurring report interpretation, but MSP workflows, account separation, and alert quality should be tested closely before rollout.
OnDMARC
Enterprise controls fit well
Parked domain separated
Grouping took planning
Postmastery
Operator review fit
Recurring reports worked
Manual client handoff
OnDMARC suited enterprise work because it connected domain grouping, role-based access, hosted records, and enforcement progress in one place. It handled the parked domain as a separate risk surface, but managing authorization groups across many domains still took planning before the client handoff was clean.
Postmastery suited SMB and operator-led use where a smaller group reviews reports and sends notes to clients or internal domain owners. Account separation and recurring reporting were workable, but MSP-style handoff needed more manual language around the unknown sender, the spoof sample, and which domains were ready for quarantine.
What each tool feels like after 90 days of real use
OnDMARC
A stronger fit for teams that want to move policy instead of only reading reports
By the end of 90 days, OnDMARC felt like a security operations tool for DMARC. We started with monitoring, proved Microsoft 365 and Google Workspace alignment, cleaned up SendGrid and Mailchimp records, then had enough evidence to plan quarantine for the corporate domain while keeping the parked domain locked down.
The product gave us useful depth, but it also made us manage more moving parts. Dynamic SPF, hosted MTA-STS, forensic views, alerts, and role-based access were helpful, but export limits and domain grouping work created friction when we prepared handoff notes for multiple owners.
Where it wins
Clear enforcement movement
Strong hosted authentication controls
Useful spoof sample handling
Good enterprise access controls
Where it lags
Exports felt limited
Interface took learning time
Grouping many domains took effort
Most pricing tiers gated
Pricing
From $9 / month
Free tier
14-day free trial
Onboarding
Three domains in one session
G2 rating
4.8 / 5
Postmastery
A better fit for deliverability teams that prefer review and interpretation
After 90 days, Postmastery felt like a reporting and deliverability review workflow more than a full DMARC enforcement product. It was useful for explaining SendGrid and Mailchimp patterns, especially when marketing volume shifted, and it gave us a sensible cadence for recurring report review.
The tradeoff was operational speed. We spent more time classifying the unknown sender, explaining the forwarded mail SPF failure, and deciding which owner should act. Without tested hosted SPF or hosted MTA-STS controls, the path from finding to DNS fix was less direct.
Where it wins
Good deliverability framing
Recurring reporting worked
Useful marketing traffic review
Consultative support style
Where it lags
Pricing was not public
Hosted records not tested
Unknown sender took work
Less direct enforcement path
Pricing
Not publicly listed
Free tier
Not publicly listed
Onboarding
More manual classification
G2 rating
0 / 5
Pricing
OnDMARC
Postmastery
Suped
Small
1 domain, up to 1k emails / month.
$9 / month
Express starts here when billed annually and supports up to 4 domains and 1 million monthly emails.
Not publicly listed as of May 15, 2026
No public entry price was available for this usage level.
$0 / month
Free plan covers 1 domain and 1,000 monthly emails.
Medium
2 domains, up to 100k emails / month.
$9 / month
Express covers this profile if feature and support needs match the tier.
Not publicly listed as of May 15, 2026
A sales conversation is needed to confirm plan fit and limits.
Entry plan covers 2 domains and 100,000 monthly emails, with 90 days retention.
Large
10 domains, up to 1 million emails / month.
Not publicly listed as of May 15, 2026
Essentials is the closest listed fit, but current public pricing is not listed.
Not publicly listed as of May 15, 2026
No public price or volume band was available for this profile.
10 domains and 1,000,000 monthly emails, with 365 days retention.
Enterprise
Over 20 domains and 1 million emails / month.
Custom
Enterprise and Premier are sales-led tiers with higher domain, support, and security requirements.
Not publicly listed as of May 15, 2026
Enterprise pricing and volume limits were not publicly available.
20 domains and 2,500,000 monthly emails, with 365 days retention. Unlimited domains/emails negotiable.
OnDMARC Express pricing is a public list price checked on May 15, 2026. OnDMARC large and enterprise pricing is estimated by plan fit because current Essentials, Enterprise, and Premier prices are not public. Postmastery pricing was not publicly listed as of May 15, 2026.
If you cannot decide between the two, maybe the answer is Suped
Suped
Get started
Cleaner owner handoff
In the test, OnDMARC surfaced many useful findings, but domain grouping and export limits added work when several owners needed action notes. Suped's guided fixes are built around turning each finding into an owner-ready task.
Faster sender classification
Postmastery made the unknown sender classification more manual during our review. Suped focuses on sending source identification so approved services, unknown sources, and spoof attempts are easier to separate.
Operational alerts with context
OnDMARC alerts needed tuning and Postmastery leaned more on recurring reports. Suped's alerting is designed to explain what changed, why it matters, and which domain or sender owner should act.
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 OnDMARC or Postmastery?
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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