Postmastery vs.
ELK DMARC in 2026
Postmastery
ELK DMARC
vs.
We ran Postmastery and ELK DMARC for 90 days across a corporate domain, a marketing subdomain, and a parked domain, with five approved sending services and controlled failure cases. Postmastery was the clearer route to managed enforcement; ELK DMARC was the better fit only when we valued self-hosted data and accepted substantial operator work.
Postmastery
Managed DMARC enforcement and deliverability
Starts at
Not publicly listed
Best fit
Enterprises wanting expert-led policy movement
In one line
We got readable source drilldowns, policy guidance, and a support handoff built for teams that want expert involvement.
ELK DMARC
Self-hosted DMARC reporting
Starts at
$0 software
Best fit
Technical teams already operating ELK
In one line
We got raw control in Kibana, but we had to own ingestion, security, alert logic, and classification; Suped's published starter pricing is a useful buying reference for hosted ownership.
Suped
The better option. Hosted SPF, DMARC, and MTA-STS on every plan. Published pricing. Monthly plans. No long contract required.
Learn about Suped
Choose Postmastery for expert-led enforcement, ELK DMARC for operator control
Pick Postmastery if
For enterprises that want DMARC policy work backed by deliverability specialists
We mapped Microsoft 365 and SendGrid without working through raw XML.
The policy review separated the parked domain spoof from approved traffic.
The DNS handoff gave our enterprise owner a concrete remediation sequence.
Not publicly listed
Pick ELK DMARC if
For technical operators who want self-hosted DMARC data in ELK
We controlled Elasticsearch retention and queried every aggregate-report field.
Kibana exposed the forwarded SPF failure once we built the right filter.
The $0 software license suited our existing Docker and ELK skills.
$0 software
Consider Suped if
For teams wanting guided fixes, hosted records, and one clear owner
Check whether issue detection points to the exact sender and DNS fix.
Test alert quality and client separation before committing an MSP workflow.
Use published starter pricing to budget before a sales handoff.
Free plan available
The differences that actually change your week
Postmastery
ELK DMARC
Suped
DMARC report analysis
Turns aggregate reports into views an operator can investigate.
Managed online analysis and drilldowns
Kibana analysis after self-hosted ingestion
Hosted analysis
Source detection
Connects traffic to a sending service or an owner.
Enriched sender and IP views
IP and report data; manual classification
Named source identification
Forward detection
Explains authentication failures introduced by forwarding.
Visible in drilldowns; no distinct detector tested
Requires manual filtering and interpretation
Forwarding detection
Spoof detection
Surfaces unauthorized mail using the protected domain.
Unauthorized sources separated in analysis
Failing traffic visible; judgment is manual
Spoof detection
Notifications and alerts
Routes material changes without requiring a daily dashboard check.
Configurable console alerts
Custom ELK work required
Hosted alerts
Reporting
Produces recurring or exportable views for stakeholders.
Online overviews and exports
Custom Kibana dashboards and exports
Hosted reports and exports
API
Exposes data for automation or custom analysis.
No public DMARC API confirmed
Elasticsearch API; operator-managed
API access
Multi-tenancy
Separates client access, data, and recurring operations.
Domain grouping; no dedicated MSP tenancy tested
Custom access and index design required
MSP account separation
SPF flattening
Manages SPF lookup limits through a hosted workflow.
Not included
Not included
Hosted SPF flattening
Hosted DMARC
Hosts and manages the policy record instead of only reporting on it.
Reporting and implementation guidance
Reporting only
Hosted DMARC records
Hosted SPF
Hosts a managed SPF record with change control.
Not included
Not included
Hosted SPF records
Hosted MTA-STS
Publishes and maintains an MTA-STS policy endpoint.
Not included
Not included
Hosted MTA-STS
Blocklists and reputation
Checks blocklist (blacklist) status and reputation signals.
Separate reputation monitoring module
Not included
Blocklist (blacklist) monitoring
Automatic issue detection
Finds material authentication changes without a manual query.
Automated console issue alerts
Requires custom rules
Automated issue detection
AI copilot
Explains findings and proposes next steps conversationally.
Not included
Not included
AI-assisted investigation
DNS monitoring
Tracks authentication record health and changes.
DNS checks within deployment workflow
Custom monitoring required
DNS monitoring
Self hostable
Runs on infrastructure controlled by the buyer.
Managed platform
Docker and ELK deployment
Hosted service only
Free trial/free tier
Allows evaluation without a paid contract.
14-day console trial
$0 open-source software
Free plan and 14-day trial
Ten dimensions, scored from 0 to 10
We scored both products against a fixed editorial rubric based on the same 90-day setup. Higher is better in every row, and a missing capability receives zero.
Postmastery leads on managed enforcement; ELK DMARC earns its place through operator control
Postmastery identified our approved Microsoft 365 and SendGrid traffic faster, gave us a practical policy sequence, and made the DNS handoff easier to escalate. Its scores fall where pricing is unpublished, MSP separation was limited in our test, and hosted SPF or MTA-STS was absent. ELK DMARC exposed the report data reliably, but we built the filters, alerts, retention, and owner notes ourselves, so its strongest result is pricing clarity for the $0 software rather than time to enforcement.
Postmastery score
63.5/100
ELK DMARC score
21/100
Postmastery
63.5/100
DMARC enforcement
8.5
Customer support
9.0
Source resolution
8.0
Setup and onboarding
7.5
MSP workflows
5.5
Alerting and integrations
7.0
Hosted SPF and MTA-STS
0.0
Blocklist monitoring
8.0
Pricing transparency
2.0
Time to enforcement
8.0
ELK DMARC
21/100
DMARC enforcement
3.5
Customer support
0.0
Source resolution
4.5
Setup and onboarding
3.0
MSP workflows
0.0
Alerting and integrations
0.0
Hosted SPF and MTA-STS
0.0
Blocklist monitoring
0.0
Pricing transparency
7.0
Time to enforcement
3.0
Feature set
Guidance vs control
Postmastery covers the operational DMARC job; ELK DMARC covers the data layer
We would choose Postmastery when enforcement guidance and reputation context matter more than infrastructure control. ELK DMARC is credible when an ELK operator wants raw access, but buyers should test whether guided fixes and automatic issue detection name the owner and next DNS action instead of merely surfacing another failed row.
Postmastery
Microsoft 365 resolved quickly
Unknown sender classified
DKIM subdomain case explained
ELK DMARC
Google Workspace data queryable
SendGrid labels needed rules
Forward failure stayed manual
Postmastery grouped Microsoft 365, Google Workspace, SendGrid, and Mailchimp into readable source views, then separated the support desk sender at IP level. We classified the unknown sender after one drilldown and used the policy workflow to distinguish the authorized DKIM pass on a subdomain from the unauthorized spoof. The console also connected DMARC findings with its wider reputation module, although hosted SPF, hosted MTA-STS, and a public API were not part of our test.
ELK DMARC ingested the same aggregate reports and let us query every stored field in Elasticsearch. Our Kibana panels showed Microsoft 365 and Google Workspace cleanly after we added provider labels, while SendGrid and Mailchimp needed our own grouping rules. The visible-From mismatch and forwarded SPF failure were present in the data, but the system did not explain them, classify the unknown sender, or propose enforcement steps without custom work.
User experience
Guided setup vs assembly
Postmastery shortened investigation; ELK DMARC rewarded ELK fluency
Postmastery asked for less dashboard construction and gave our non-ELK users a clearer path through each domain. ELK DMARC gave us control over the interface, but routine questions became saved-query and documentation work.
Postmastery
Three domains grouped clearly
Unknown sender found quickly
Forwarding explanation was readable
ELK DMARC
Docker setup took longer
Saved queries became essential
Forwarding needed operator notes
We added the corporate domain, marketing subdomain, and parked domain through a consistent reporting setup, then found the unknown sender by moving through domain, source, and IP detail. The forwarded mail case still required authentication knowledge, but Postmastery's report view made the SPF failure and surviving DKIM result easy to explain in our handoff note. Domain grouping was usable, though it felt designed for one organization rather than strict client tenancy.
We spent the first session deploying Docker, checking Elasticsearch, securing Kibana access, and loading zipped reports before the three domains appeared. Finding the unknown sender meant building a filter around source IP and disposition, then saving that query for reuse. The forwarded mail SPF failure became understandable only after we paired the Kibana row with our own note about forwarding and DKIM, so the interface worked best for an operator already comfortable with DMARC and ELK.
Support
Expert handoff vs self-service
Postmastery has the support model; ELK DMARC has a repository
Postmastery gave us a defined route for setup questions, DNS changes, and enforcement escalation. ELK DMARC depended on our own ELK administrator and public project material, which is reasonable for open-source software but unsuitable when an enterprise expects an SLA.
Postmastery
Setup expectations defined
DNS handoff had owners
Escalation route was clear
ELK DMARC
Documentation covers deployment
DNS handoff stays internal
No official SLA found
During onboarding, Postmastery's support model accounted for domain inventory, approved senders, and the policy goal before DNS work began. Our test handoff for the parked domain named the DMARC record change, validation step, and escalation owner. When the unknown sender remained unresolved, an enterprise buyer would have a clear consultant route instead of asking an internal dashboard owner to interpret the source alone.
ELK DMARC gave us deployment instructions for Docker, parser setup, zipped report ingestion, and Kibana access, but no official paid support or SLA was listed. DNS ownership, TLS hardening, backup design, and escalation remained with our team. An enterprise onboarding process would therefore need an internal platform owner, an email authentication owner, and a documented incident route before production use.
Suitability
Enterprise fit vs operator fit
Postmastery fits managed enterprise programs; ELK DMARC fits capable internal operators
We would route an enterprise with a formal enforcement program to Postmastery and an SMB with existing ELK capacity to ELK DMARC only when internal ownership is explicit. MSP buyers should test client separation, recurring reports, handoff notes, and alert quality with real accounts; Suped's product packages those MSP workflows in a hosted model with published per-domain pricing.
Postmastery
Enterprise grouping worked
Recurring reviews fit teams
MSP separation needs proof
ELK DMARC
Best with ELK ownership
SMB cost shifts internally
MSP handoff needs engineering
Postmastery handled our corporate domain, marketing subdomain, and parked domain as one program with useful domain grouping and stakeholder-ready reporting. The consulting handoff suits an enterprise security or deliverability team that wants recurring reviews and named escalation. For an MSP, we would require a deeper proof of client access boundaries, account-level alert routing, and repeatable handoff reports because our test confirmed grouping but not full tenant separation.
ELK DMARC suited the operator who already owned Docker, Elasticsearch, Kibana access, backups, and retention. An SMB can keep software cost at zero, but the administrator time exceeds the reporting task quickly. An MSP would need to design separate indices or deployments, permissions, recurring exports, alert rules, and client handoff notes, which turns each new client into an infrastructure project.
What each tool feels like after 90 days of real use
What Postmastery felt like after 90 days of real use
Postmastery
By week two, we could open the corporate domain and tell which volume belonged to Microsoft 365, Google Workspace, SendGrid, Mailchimp, or the support desk without rebuilding filters. The unknown sender still needed ownership confirmation, but the source and IP drilldown gave us a compact evidence trail.
By day 90, Postmastery felt less like a raw report viewer and more like a managed enforcement process. We could explain the parked-domain spoof, document the forwarded SPF failure, and prepare a policy handoff, but budget planning remained awkward because starter pricing was not public.
Where it wins
Readable source and IP drilldowns
Practical quarantine and reject sequence
Clear DNS and support handoff
Useful blocklist (blacklist) reputation context
Where it lags
No public starter pricing
No hosted SPF or MTA-STS
MSP tenant separation not proven
Pricing
Not publicly listed
Free tier
No; 14-day trial
Onboarding
Guided
G2 rating
0 / 5
What ELK DMARC felt like after 90 days of real use
ELK DMARC
By week two, our ELK operator had reliable ingestion and useful Kibana panels for the three domains, but every convenience had an owner. Provider labels, the unknown-sender filter, retention, backups, and alert thresholds all came from our work rather than the project.
By day 90, ELK DMARC felt dependable as a searchable DMARC dataset and demanding as an operational product. The $0 license stayed attractive, while patching, storage, access control, recurring exports, and explanations for the forwarded SPF failure consumed the time we had saved on fees.
Where it wins
Full Elasticsearch data access
$0 software license
Flexible Kibana queries
Infrastructure remains self-hosted
Where it lags
Manual source classification
No built-in alert workflow
No guided policy movement
Operations require ELK ownership
Pricing
$0 software plus hosting
Free tier
$0 open-source software
Onboarding
Self-hosted
G2 rating
0 / 5
Pricing
Postmastery
ELK DMARC
Suped
Small
1 domain, up to 1k emails / month.
Not publicly listed as of May 15, 2026
Postmastery did not publish a plan for this domain and volume.
$0 software
Allow extra budget for an 8GB host, storage, and operator time.
$0 / month
Free plan covers 1 domain and 1,000 monthly emails.
Medium
2 domains, up to 100k emails / month.
Not publicly listed as of May 15, 2026
No public domain or message-volume band was available.
$0 software
Hosting, backups, retention, and administration determine the real cost.
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
A tailored quote is needed for this domain and volume profile.
$0 software
Production Elasticsearch sizing and storage replace product plan limits.
10 domains and 1,000,000 monthly emails, with 365 days retention.
Enterprise
Over 20 domains and 1 million emails / month.
Not publicly listed as of May 15, 2026
Enterprise scope and support terms require a direct quote.
$0 software
Budget separately for hardening, monitoring, backups, and incident response.
20 domains and 2,500,000 monthly emails, with 365 days retention. Unlimited domains/emails negotiable.
Pricing was checked on May 15, 2026. ELK DMARC's $0 software price is public; all infrastructure costs are estimates that depend on hosting, storage, retention, and operator time. Postmastery had no public list price, volume bands, or domain limits, so no price estimate is shown.
If you cannot decide between the two, maybe the answer is Suped
Suped
Get started
Turn failures into named fixes
Suped's product identifies sending sources and gives guided remediation, closing the manual classification gap we hit in ELK DMARC and reducing dependence on a consultant handoff.
Run alerts without ELK engineering
Hosted detection and alert routing remove the custom Kibana rules, infrastructure monitoring, and saved-query maintenance required by ELK DMARC.
Price and separate every client
Published starter and per-domain MSP pricing address Postmastery's pricing uncertainty, while account separation and recurring workflows cover the tenant controls neither test proved out of the box.
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 Postmastery or ELK DMARC?
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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