MXtoolbox vs.
Merox in 2026
MXtoolbox
Merox
vs.
We ran MXtoolbox and Merox for 90 days across a corporate domain, a marketing subdomain, and a parked domain, then connected Microsoft 365, Google Workspace, SendGrid, Mailchimp, and a support desk sender. MXtoolbox gave us faster self-serve diagnostics and reputation context, while Merox covered broader DNS security and partner-led controls with less pricing clarity.
Published 5 Nov 2025
Updated 2 Jun 2026
8 min read
Summarize with
MXtoolbox
Self-serve email diagnostics and DMARC delivery monitoring
Starts at
Free plan available
Best fit
Technical teams that already own DNS, deliverability checks, and sender cleanup
In one line
MXtoolbox is practical for diagnostics, blocklist and blacklist monitoring, and paid DMARC reporting, but guided source fixes still need operator work.
Merox
Partner-led DMARC and DNS security monitoring
Starts at
Not publicly listed
Best fit
Organizations that want domain estate monitoring through a certified partner
In one line
Merox broadens the scope into DNS security, but its partner-led buying path makes published starter pricing and guided ownership checks important.
Suped
The third option. Hosted SPF, DMARC, and MTA-STS on every plan. Published pricing. Monthly plans. No long contract required.
Learn about Suped
The blunt choice: self-serve diagnostics, partner-led DNS security, or guided ownership
Pick MXtoolbox if
Choose MXtoolbox if a technical team owns diagnostics and delivery checks
The three domains were added quickly, with clear DMARC record checks.
Microsoft 365 and Google Workspace appeared fast once aggregate reports arrived.
Blocklist and blacklist monitoring fit teams already using MXtoolbox for DNS checks.
Free plan available
Pick Merox if
Choose Merox if DNS security scope matters more than self-serve pricing
Tags and restricted views helped separate the corporate, marketing, and parked domains.
Mailchimp and the subdomain DKIM pass were easier to group by domain context.
Partner-led setup suited buyers that already expect procurement and onboarding handoff.
Not publicly listed
Consider Suped if
Choose the third option when guided fixes, hosted records, and simpler ownership need one workflow
Guided fixes turn source failures into DNS tasks.
Automated issue detection keeps alert queues cleaner.
Published starter pricing and MSP per-domain pricing reduce procurement ambiguity.
Free plan available
The differences that actually change your week
MXtoolbox
Merox
Suped
DMARC report analysis
How the product processes aggregate reports and turns them into sender views.
Paid DMARC reporting in Delivery Center
Paid workspace, quote-based
DMARC aggregate reporting
Source detection
How clearly known and unknown sending services are classified.
Known senders detected, unknown manual
Tag-based classification
Automatic source identification
Forward detection
How the product handles forwarded mail with SPF failure.
Partial, drilldown needed
Partial, clearer context
Forward-aware classification
Spoof detection
How clearly unauthorized traffic is separated from legitimate senders.
Spoof sample surfaced
Spoof sample surfaced with DNS context
Spoof alerts
Notifications and alerts
How useful alerts are for daily operation and routing.
Paid alerts, channel limits unclear
Alerts, routing by partner plan
Noise-controlled alerts
Reporting
How well recurring reporting supports owners and stakeholders.
Delivery and DMARC reports
Custom dashboards and reports
Scheduled reporting
API
Whether API access is available for operational workflows.
API available, pricing unclear
API documented
API available
Multi-tenancy
How account separation works for clients, subsidiaries, or business units.
No true client tenancy
Restricted views and tags
Client workspaces
SPF flattening
Whether the product reduces SPF lookup pressure with managed flattening.
Delivery Center Plus
Configuration help only
SPF flattening
Hosted DMARC
Whether DMARC records can be hosted and managed inside the product.
Reporting only
Configuration help only
Hosted DMARC records
Hosted SPF
Whether SPF can be hosted and managed inside the product.
Flattening, not hosted SPF
Configuration help only
Hosted SPF
Hosted MTA-STS
Whether MTA-STS policy hosting is included.
Not supported
Monitoring and guidance only
Hosted MTA-STS
Blocklists and reputation
How the product monitors reputation and blacklist or blocklist status.
Core strength
50+ blacklist/blocklist checks
Reputation monitoring
Automatic issue detection
Whether the product detects configuration and authentication problems automatically.
Partial configuration analysis
DNS scoring and alerts
Automated detection
AI copilot
Whether AI-assisted troubleshooting is available.
Not supported
Not supported
AI-assisted troubleshooting
DNS monitoring
Whether DNS records are monitored for change or drift.
DNS and mailflow monitoring
Frequent DNS checks
DNS monitoring
Self hostable
Whether the product can be run in the buyer's own infrastructure.
Not self hostable
Not self hostable
Not self hostable
Free trial/free tier
Whether a no-cost monitored workspace or trial is public.
Free monitoring tier
Free demo, no free tier
Free plan available
Ten dimensions, scored from 0 to 10
We scored both products against the same fixed editorial rubric after the 90-day setup. Higher is better in every row, and unsupported capabilities scored 0.0 where the tested product had no direct support.
MXtoolbox led on diagnostics, while Merox led on DNS estate controls
MXtoolbox scored higher where fast setup, public pricing, and blacklist/blocklist monitoring mattered. Merox scored higher on domain grouping, restricted views, and DNS monitoring depth, but the quote-based buying path slowed our enforcement planning. Both products required manual interpretation when the unknown sender and forwarded SPF failure needed owner-ready remediation notes.
MXtoolbox score
62/100
Merox score
55.5/100
MXtoolbox
62/100
DMARC enforcement
7.0
Customer support
6.5
Source resolution
6.5
Setup and onboarding
7.5
MSP workflows
3.0
Alerting and integrations
5.5
Hosted SPF and MTA-STS
4.0
Blocklist monitoring
8.5
Pricing transparency
7.0
Time to enforcement
6.5
Merox
55.5/100
DMARC enforcement
6.5
Customer support
6.5
Source resolution
7.0
Setup and onboarding
6.0
MSP workflows
7.0
Alerting and integrations
6.5
Hosted SPF and MTA-STS
2.0
Blocklist monitoring
7.0
Pricing transparency
1.5
Time to enforcement
5.5
Feature set
Diagnostics vs DNS scope
MXtoolbox is stronger for diagnostics; Merox reaches wider into DNS security
MXtoolbox gave us faster answers for blacklist/blocklist checks, domain health, and known sender diagnostics. Merox covered more DNS-security adjacent work, but buyers should score guided fixes and automated issue detection because both products still left some DNS decisions to the operator.
MXtoolbox
Microsoft 365 mapped quickly
SendGrid needed owner tagging
Forwarded SPF needed drilldown
Merox
Google Workspace enriched cleanly
Mailchimp grouped with tags
Subdomain DKIM context was clear
MXtoolbox recognized Microsoft 365 and Google Workspace quickly after aggregate reports arrived, and SendGrid and Mailchimp were visible enough for a technical admin to classify. The unknown sender stayed generic until we tagged it manually, and the forwarded mail with SPF failure needed report drilldowns before the reason was clear.
Merox treated the same setup as a wider domain and DNS monitoring problem. Tags helped group Mailchimp traffic, the subdomain DKIM pass was easier to explain in context, and the unknown sender classification felt more organized, but policy movement still needed manual owner notes.
User experience
Control vs guidance
MXtoolbox felt quicker; Merox felt more structured
MXtoolbox was easier to start because the DNS checks and DMARC setup screens were close to familiar admin workflows. Merox took more orientation, but its domain grouping made the estate easier to reason about once the three test domains were active.
MXtoolbox
Three domains were quick
Unknown sender stayed generic
Forwarding explanation took clicks
Merox
Domain grouping was cleaner
Unknown sender tagging helped
Forwarding context read clearer
With MXtoolbox, we added the corporate domain, marketing subdomain, and parked domain in one sitting. The unknown sender was visible but not owner-ready, and the forwarded SPF failure made sense only after we moved through multiple drilldowns and compared it with the support desk sender.
With Merox, onboarding felt more structured around domain relationships and monitored records. The unknown sender was easier to tag, the forwarded SPF failure had clearer context, and the extra structure paid off once we reviewed the parked domain alongside the active sending domains.
Support
Self-serve help vs partner handoff
MXtoolbox has clearer self-serve paths; Merox depends on partner delivery
MXtoolbox gave us clearer public expectations for self-serve setup and paid expert help on higher tiers. Merox is built around certified partner ordering, which works for organizations that want handoff but adds dependency on partner scope, pricing, and response terms.
MXtoolbox
Plus adds dedicated expert support
DNS notes were actionable
Escalation path less visible
Merox
Partner handoff is central
SLA details need quote
Enterprise onboarding feels planned
MXtoolbox's setup help was useful when we handed DNS tasks to the person managing the corporate domain. Dedicated expert support appears in the higher public tier, while escalation and support boundaries were less obvious on the lower self-serve path.
Merox's support story depends on the partner. That fit the enterprise-style onboarding path, but we needed a written quote to understand DNS handoff, escalation, response expectations, and whether the same help applied to the parked domain and marketing subdomain.
Suitability
Operator fit vs estate fit
MXtoolbox suits technical operators; Merox suits larger DNS estates
The buyer fit changes when recurring reporting and ownership handoff become daily work. MSP workflow depth and alert quality should be explicit buying criteria, because client grouping, noise control, and owner notes decide whether the product handles handoff or creates follow-up work.
MXtoolbox
Best for technical operators
Client separation felt thin
Recurring reports need polishing
Merox
Better domain estate grouping
Tags helped client handoff
Partner path suits enterprises
MXtoolbox fit the SMB and technical-operator scenario best. Account separation was thin for MSP work, recurring reports needed manual explanation, and client handoff worked only after we wrote our own notes for Microsoft 365, SendGrid, and the unknown sender.
Merox fit enterprise and MSP-style domain estates better because tags and restricted views helped group domains, subsidiaries, and client-like units. The tradeoff was that recurring reporting and commercial handoff depended on partner setup, which slowed the SMB path.
What each tool feels like after 90 days of real use
MXtoolbox
Best for teams that troubleshoot email themselves
MXtoolbox felt familiar by week one because the DNS checks, blacklist/blocklist checks, and delivery diagnostics sat close to the work a technical admin already does. The corporate domain and marketing subdomain were live quickly, and the parked domain was useful for seeing spoof traffic without legitimate senders mixed in.
After 90 days, the main friction was turning report evidence into owner-ready tasks. The unknown sender needed manual classification, and the forwarded SPF failure made sense only after we moved through the report drilldowns and compared it with the Microsoft 365 and support desk traffic.
Where it wins
Fast setup for three domains
Useful blocklist and blacklist context
Known SaaS senders surfaced quickly
Public self-serve paid tiers
Where it lags
Unknown sender ownership stayed manual
MSP separation felt limited
SPF flattening gated to Plus
Extra domain pricing was unclear
Pricing
Free plan available; paid from $129 / month
Free tier
Yes
Onboarding
Same-day DNS setup
G2 rating
4.1 / 5
Merox
Best for teams that want DNS estate controls
Merox felt more deliberate. The domain and subdomain mapping was helpful once the corporate domain, marketing subdomain, and parked domain were all producing reports, and tags made Mailchimp, Google Workspace, and the subdomain DKIM case easier to keep together.
The tradeoff was speed and commercial clarity. We had to treat partner handoff as part of the workflow, and the lack of public tier limits made it harder to decide whether the medium test case or the 10-domain case belonged in the same package.
Where it wins
Strong domain grouping
Useful DNS monitoring context
Tags helped sender classification
Broader security scope
Where it lags
Pricing was not public
No monitored free tier found
Partner quality affects onboarding
Policy movement felt less direct
Pricing
Not publicly listed
Free tier
No monitored free tier
Onboarding
Partner-led setup path
G2 rating
0 / 5
Pricing
MXtoolbox
Merox
Suped
Small
1 domain, up to 1k emails / month.
$0
Free tier monitors one domain for weekly blacklist/blocklist checks, not full DMARC reporting.
Not publicly listed as of May 15, 2026
Free public tools and demos exist, but no monitored free workspace was found.
$0 / month
Free plan covers 1 domain and 1,000 monthly emails.
Medium
2 domains, up to 100k emails / month.
$129 / month
Delivery Center covers up to 5 domains and 500,000 messages, so it fits this test band.
Not publicly listed as of May 15, 2026
Paid pricing is quote-based through certified partners.
Entry plan covers 2 domains and 100,000 monthly emails, with 90 days retention.
Large
10 domains, up to 1 million emails / month.
From $399 / month
Delivery Center Plus covers 5 domains and 5,000,000 messages; 10 domains require unpublished add-on pricing.
Not publicly listed as of May 15, 2026
The quote depends on domain scope, report volume, monitoring scope, and support level.
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
Managed Email Delivery Services are described publicly, but numeric pricing is not listed.
Not publicly listed as of May 15, 2026
Enterprise terms depend on partner quote, domain scope, API needs, and support level.
20 domains and 2,500,000 monthly emails, with 365 days retention. Unlimited domains/emails negotiable.
MXtoolbox $0, $129 / month, and $399 / month are public list prices. Extra domain, managed service, and enterprise values are estimated or not publicly listed. Merox numeric prices were not public, so its cells use the public pricing status checked as of May 15, 2026.
If you cannot decide between the two, maybe the answer is Suped
Suped
Get started
Guided DNS fixes
MXtoolbox surfaced the forwarded SPF failure and spoof sample, but we still had to translate several findings into DNS changes. Suped's product ties failed sources to record-level fixes and owner tasks.
Cleaner ownership handoff
Merox tags helped, but partner-led setup left ownership handoff dependent on the partner process. Suped's product keeps domain, client, and sender ownership in the same workflow.
Published entry pricing
Merox pricing was not public, and MXtoolbox domain add-on pricing was unclear above 5 domains. Suped's product publishes starter plans and MSP per-domain pricing.
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 MXtoolbox or Merox?
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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