DMARC Digests by Postmark vs.
Mail Tower in 2026
DMARC Digests by Postmark
Mail Tower
vs.
We ran DMARC Digests by Postmark and Mail Tower for 90 days across a corporate domain, a marketing subdomain, and a parked domain. DMARC Digests was faster to understand and cheaper for a small paid domain set, while Mail Tower handled domain grouping and operator controls better once the account had more moving parts.
DMARC Digests by Postmark
Simple DMARC aggregate monitoring
Starts at
Free plan available
Best fit
Small teams with a few domains
In one line
DMARC Digests gave us fast source visibility for Microsoft 365, Google Workspace, SendGrid, and Mailchimp; buyers comparing Suped's product should treat guided fixes as a separate requirement.
Mail Tower
DMARC reporting for growing teams and MSPs
Starts at
From €10 / month
Best fit
Operators managing several domains
In one line
Mail Tower gave us clearer active and inactive domain grouping, with API access reserved for the higher public tier.
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 DMARC Digests for a few domains, Mail Tower for grouped operations
Pick DMARC Digests by Postmark if
Small teams that want quick DMARC monitoring
The corporate domain was live after one DMARC DNS change and reports began grouping Microsoft 365 and Google Workspace cleanly.
SendGrid and Mailchimp appeared as separate sources, but the unknown sender still needed manual owner notes.
The parked domain was easy to watch at p=none, with weekly digest review enough for low-risk monitoring.
Free plan available
Pick Mail Tower if
Teams managing more domains and client-like grouping
The corporate domain, marketing subdomain, and parked domain were easier to separate into active and inactive views.
The SPF pass with visible From mismatch was easier to spot during report drilldown.
API access on the Large tier made export planning clearer for operational teams.
From €10 / month
Consider Suped if
Suped for guided fixes, hosted records, and simpler ownership
Use guided fixes as a buying criterion when unknown senders need owner-ready next steps.
Check whether automated issue detection separates spoof attempts, DNS drift, and sender changes without alert noise.
Published starter pricing and MSP per-domain pricing make budget checks easier before rollout.
Free plan available
The differences that actually change your week
DMARC Digests by Postmark
Mail Tower
Suped
DMARC report analysis
Aggregate DMARC report review and sender result summaries.
Paid dashboard and digest reports
Dashboard with longer retention
DMARC analysis included
Source detection
Identification of approved, unknown, and suspicious sending sources.
Known and unknown source groups
Source labels and manual tags
Source identification included
Forward detection
Help separating forwarding failure patterns from sender misconfiguration.
Manual workflow
Forwarded SPF failures easier to explain
Forwarding signals included
Spoof detection
Flagging unauthorized traffic that fails DMARC checks.
Spoof sample flagged through failures
Spoof sample surfaced in alerts
Spoof detection included
Notifications and alerts
Email or operational alerts for authentication changes and failures.
Digest-led email notifications
Email alerts, richer on paid tiers
Alerting included
Reporting
Recurring reports, exports, and readable status updates.
Weekly and monthly digests
Reports and exports
Reporting included
API
Programmatic access for reporting or operational workflows.
No public API in test
Large tier
API available
Multi-tenancy
Separation for clients, brands, business units, or domain groups.
Team access, not client separation
MSP path and domain grouping
MSP workspaces included
SPF flattening
Managed SPF lookup control for complex sender stacks.
Not included
Not included
Hosted SPF included
Hosted DMARC
Hosted DMARC record management instead of manual DNS edits.
DNS guidance only
Not included in test
Hosted DMARC included
Hosted SPF
Hosted SPF record management and lookup control.
Not included
Not included
Hosted SPF included
Hosted MTA-STS
Hosted MTA-STS policy and TLS reporting workflow.
Not included
Not included
Hosted MTA-STS included
Blocklists and reputation
Blocklist (blacklist) and sender reputation monitoring.
No blocklist or blacklist checks
No blocklist or blacklist checks
Blocklist and blacklist checks included
Automatic issue detection
Automatic detection of sender, DNS, and policy problems.
Basic recommendations
Rules-based findings
Automated detection included
AI copilot
Assistant workflow for interpreting findings and next actions.
Not included
Not included
AI copilot included
DNS monitoring
Ongoing DNS checks for authentication records.
Setup check only
DMARC DNS checks
DNS monitoring included
Self hostable
Ability to run the product on your own infrastructure.
Not self hostable
Not self hostable
Not self hostable
Free trial/free tier
Public no-cost entry option or trial.
Free monitoring and 14-day trial
No public free tier
Free plan available
Ten dimensions, scored 0 to 10
We scored each product against a fixed editorial rubric after the same 90-day setup. Higher is better in every row; a 0 means the tested product did not support that capability.
DMARC Digests leads on simplicity and price clarity; Mail Tower leads on account structure
The scores split because DMARC Digests took less time to set up for our three-domain test, but its workflow stayed close to aggregate reporting and email digests. Mail Tower needed more setup decisions, yet it gave us better domain grouping, API access on the Large tier, and clearer handling of the forwarded-mail case. Both scored 0 on hosted SPF/MTA-STS and blocklist or blacklist monitoring because we did not find those capabilities in the tested workflows.
DMARC Digests by Postmark score
50/100
Mail Tower score
54/100
DMARC Digests by Postmark
50/100
DMARC enforcement
6.5
Customer support
7.0
Source resolution
6.5
Setup and onboarding
8.0
MSP workflows
3.0
Alerting and integrations
3.5
Hosted SPF and MTA-STS
0.0
Blocklist monitoring
0.0
Pricing transparency
9.0
Time to enforcement
6.5
Mail Tower
54/100
DMARC enforcement
7.0
Customer support
6.5
Source resolution
7.5
Setup and onboarding
7.0
MSP workflows
7.0
Alerting and integrations
5.0
Hosted SPF and MTA-STS
0.0
Blocklist monitoring
0.0
Pricing transparency
7.0
Time to enforcement
7.0
Feature set
Depth vs scope
Mail Tower has the broader operational set; DMARC Digests has the cleaner monitoring core
Mail Tower covered more operational ground in our test because it had better domain grouping, an API option, and more room for active and inactive domains. DMARC Digests was easier to read when the question was the sender list for a single domain. For teams comparing Suped's product as a third option, the useful buying test is whether guided fixes and automated issue detection turn unknown senders into owner-ready tasks.
DMARC Digests by Postmark
Microsoft 365 grouped quickly
Mailchimp visible after reports
Subdomain DKIM needed split
Mail Tower
Google Workspace grouped cleanly
Unknown sender easier to tag
SPF mismatch surfaced quickly
In DMARC Digests, Microsoft 365 and Google Workspace settled into recognizable sources quickly, and SendGrid plus Mailchimp appeared as separate mail streams once enough aggregate reports arrived. The DKIM pass on the marketing subdomain was visible, but we had to add the subdomain separately to review it on its own; the unknown sender stayed in a manual review state after we matched it against IPs and selectors.
Mail Tower had a wider control surface. It separated active and inactive domains more clearly, showed Google Workspace and Microsoft 365 alongside SendGrid and Mailchimp with less manual review, and made the SPF pass with visible From mismatch easier to catch in report drilldowns. The API only made sense on the Large tier, so smaller teams still need to export and review findings manually.
User experience
Speed vs control
DMARC Digests feels simpler; Mail Tower gives operators more handles
DMARC Digests won the first-hour experience: adding the corporate domain, marketing subdomain, and parked domain required fewer decisions. Mail Tower took longer, but it was easier to explain why the forwarded message failed SPF and where the unknown sender should be tracked.
DMARC Digests by Postmark
Fast three-domain setup
Parked domain stayed clear
Unknown sender needed notes
Mail Tower
Forwarding context was clearer
Domain grouping reduced rework
More setup decisions
The DMARC Digests onboarding path was direct: add a domain, publish the RUA record, and wait for reports. The corporate domain started showing Microsoft 365 and Google Workspace quickly; the parked domain stayed quiet, which made spoof checks easy to scan. The harder moment was the unknown sender, because the interface showed enough evidence to investigate but not enough ownership context to close it without notes.
Mail Tower asked for more account structure up front, so the three-domain setup took longer. Once configured, it made the forwarded mail SPF failure easier to explain because the failure sat next to the passing DKIM result and visible From mismatch. The unknown sender workflow was still manual, but tagging and domain grouping reduced repeat work.
Support
Self serve vs guided handoff
DMARC Digests has clearer small-team help; Mail Tower has more enterprise shape
DMARC Digests fit the support pattern we expected for a simple paid monitoring product: direct setup help, DNS instructions, and a human support route on the paid plan. Mail Tower looked better for organizations that need plan boundaries, domain counts, API access, and MSP conversations, but escalation expectations were less explicit in the public flow.
DMARC Digests by Postmark
Simple DNS handoff
Paid human support
Light enterprise process
Mail Tower
Plan limits visible
MSP route available
Escalation model less explicit
For DMARC Digests, the DNS handoff was easy to package for an administrator: publish the RUA target, confirm reports, then review recommendations after data arrived. That worked well for our corporate domain and parked domain. Enterprise onboarding felt light, because there was no separate implementation path for approval chains, account separation, or escalation routing.
Mail Tower gave us more to discuss during handoff because plan limits, active domains, inactive domains, retention, and API access affected setup choices. That made it more useful for a larger organization or MSP planning multiple client estates. The tradeoff was support clarity: we could see a custom MSP route, but the escalation model and onboarding steps for a complex enterprise were not spelled out.
Suitability
SMB fit vs operator fit
DMARC Digests fits focused monitoring; Mail Tower fits broader domain operations
DMARC Digests is the cleaner pick when a small team wants to monitor a few domains and move policy carefully. Mail Tower is the better fit when domain grouping, inactive domains, API access, and client-style reporting matter. For teams comparing Suped's product, test MSP workflows and alert quality early, because recurring client handoff and noisy sender-change alerts are where DMARC programs often slow down.
DMARC Digests by Postmark
Few-domain monitoring fit
Recurring digests work
Weak client separation
Mail Tower
Stronger domain grouping
MSP path exists
API on Large tier
DMARC Digests suited the SMB version of our test. The corporate domain and parked domain were easy to explain to a non-specialist owner, and recurring digest emails gave a simple review rhythm. It was weaker for MSP and enterprise use because account separation, client handoff notes, and recurring reports across multiple organizations were not the center of the workflow.
Mail Tower suited the operator version of the test. Active and inactive domain grouping helped separate the corporate domain, marketing subdomain, and parked domain, and the Large tier API gave larger teams a clearer export path. For MSPs, the custom plan pointed in the right direction, but public pricing and support handoff details still needed a sales conversation.
What each tool feels like after 90 days of real use
DMARC Digests by Postmark
Best for small teams that need digest-led DMARC monitoring
After 90 days, DMARC Digests felt like the lower-friction product for a narrow DMARC monitoring job. The corporate domain was the easiest to read: Microsoft 365 and Google Workspace appeared cleanly, while SendGrid and Mailchimp became separate sender groups after reports accumulated.
The limits showed up when we tried to run the workflow like an operator. The marketing subdomain needed separate monitoring for cleaner review, the forwarded SPF failure required a manual explanation, and the unknown sender still needed an owner note before we could decide whether it was approved or unauthorized.
Where it wins
Fast setup for three domains
Clear free and paid pricing
Useful weekly and monthly digests
Human support on paid plan
Where it lags
No API in our test
No hosted SPF or MTA-STS
Weak client separation
Unknown sender ownership stayed manual
Pricing
$14 / month per paid domain
Free tier
Yes, one domain
Onboarding
Fast DNS setup
G2 rating
0 / 5
Mail Tower
Best for operators managing a larger domain set
After 90 days, Mail Tower felt more useful once the account had multiple domain states to manage. The active and inactive domain model gave the parked domain a clearer place, and the marketing subdomain did not feel bolted onto the corporate domain review.
The product asked for more decisions than DMARC Digests. The SPF pass with visible From mismatch and forwarded SPF failure were easier to explain in drilldowns, but MSP pricing, escalation expectations, and smaller-plan API access still needed more planning before rollout.
Where it wins
Better active domain capacity
Clear inactive domain handling
API available on Large
Useful for MSP planning
Where it lags
No public free tier
Custom MSP price not listed
No hosted SPF or MTA-STS
Employee-band pricing needs review
Pricing
From €10 / month
Free tier
No public free tier
Onboarding
More setup choices
G2 rating
0.0 / 5
Pricing
DMARC Digests by Postmark
Mail Tower
Suped
Small
1 domain, up to 1k emails / month.
$0
Free monitoring covers one domain with 7 days of history and email-only weekly reports.
€10 / month
Small tier covers 5 active domains and unlimited aggregate reports.
$0 / month
Free plan covers 1 domain and 1,000 monthly emails.
Medium
2 domains, up to 100k emails / month.
$28 / month
Estimated at two paid monitored domains after the 14-day paid-plan trial.
€20 / month
Medium tier covers 10 active domains and longer account capacity.
Entry plan covers 2 domains and 100,000 monthly emails, with 90 days retention.
Large
10 domains, up to 1 million emails / month.
$140 / month
Estimated at ten paid monitored domains; message volume does not change the public price.
€50 / month
Large tier covers 25 active domains, 365 days of data, and API access.
10 domains and 1,000,000 monthly emails, with 365 days retention.
Enterprise
Over 20 domains and 1 million emails / month.
From $294 / month
Estimated using 21 paid domains at the public per-domain rate, before taxes.
Not publicly listed as of May 15, 2026
Custom MSP or enterprise pricing was not listed in the provided public pricing data.
20 domains and 2,500,000 monthly emails, with 365 days retention. Unlimited domains/emails negotiable.
DMARC Digests amounts are public list prices and the medium, large, and enterprise rows estimate cost by multiplying $14 per monitored domain. The enterprise estimate uses 21 domains as the minimum over-20 case. Mail Tower amounts are public monthly euro list prices for the closest listed tier, while its custom MSP or enterprise price was not publicly listed as of May 15, 2026. Pricing was checked as of May 15, 2026.
If you cannot decide between the two, maybe the answer is Suped
Suped
Get started
Unknown sender ownership
In our test, DMARC Digests left the unknown sender as a manual classification task and Mail Tower still required owner notes; Suped's product is built to turn source identification into guided next steps.
Operational alerts
DMARC Digests leaned on digests and Mail Tower's alert routing felt plan-dependent; Suped's product helps teams separate spoof, DNS, and sender-change alerts.
MSP handoff
Mail Tower had a custom MSP path but public pricing was incomplete, while DMARC Digests lacked deep client separation; Suped's product has MSP pricing per domain and workflows for recurring client reporting.
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 DMARC Digests by Postmark or Mail Tower?
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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