8 Best MXToolbox Alternatives in 2026 [I've Compared & Ranked]

When you want a quick insight into your email domains, MXToolbox is often the first choice.

It allows quick check of DNS records, blacklists, SPF, DKIM, DMARC, and other email details without any setup.

However, MXToolbox can feel limited when you need ongoing domain monitoring, inbox placement testing, or multi-domain management.

Here are some of the limitations you may find of MXToolbox:

• You have to check blacklist, SPF, and DMARC results separately.
• The free plan only includes basic lookups.
• Inbox placement testing and multi-domain monitoring require paid plans.
• Some DKIM and SPF results need additional verification.
• There is no client separation or white-labeling for agencies.
• It has an outdated interface which results into poor user experience .
• Support can be slow, especially for billing and cancellations.

If you need detailed monitoring or want to manage multiple domains and clients from one place, an MXToolbox alternative may make more sense.

In this guide, I'll compare 8 MXToolbox alternatives based on their features, pricing, strengths, and limitations.

TL;DR: Which MXToolbox Alternative is the Best?

If you are in a hurry, here are the three picks that stood out in my testing.

1. Overall Best MXToolbox Alternative is Warmforge: It offers premium mailbox warmup, inbox placement testing, and monitoring for DNS, MX, and blacklist status.
2. Best for Detailed Placement Testing is GlockApps: It gives you a detailed view of where your emails land by testing them across 70+ mailbox providers.
3. Best for Multiple Domains is PowerDMARC: It helps you monitor DMARC reports and see which services send emails using your domains.

8 Top MXToolbox Alternatives Compared at a Glance

Here is how all nine compare on price, monitoring, placement testing, and free trial.

Scroll sideways to see every column.

8 Best MXToolbox Alternatives in 2026 (Discussed in Detail)

Let's now understand each tool in detail with their pros, cons, pricing, and key features.

1. Warmforge

Best For: GTM teams and agencies who want mailbox health, placement testing, and blacklist alerts in one place.

Warmforge is an AI email warmup and deliverability platform. It helps you warm up mailboxes, test inbox placement, and protect your sender reputation.

When compared to MXToolbox, Warmforge gives you more ways to improve deliverability. You can warm mailboxes, test placement, and track mailbox health from one dashboard.

Warmforge uses only aged email accounts in its warmup pool. You can also keep warmup running continuously to maintain mailbox health.

The platform provides detailed placement reports, domain health checks, blacklist monitoring, and a Heat Score™. These features help you spot deliverability issues early and protect your mailboxes from getting blacklisted.

Warmforge also supports MCP, CLI, and API access. You can connect it with Claude, Cursor, your terminal, or your own workflows.

Overall, Warmforge brings warmup, placement testing, monitoring, and automation into one place.

Why Warmforge Is My Top MXToolbox Alternative

Warmforge is the only tool on this list that closes every gap MXToolbox platform.

• Monitoring: Health Checks run on their own and alert you when a DNS record, MX record, or blacklist entry changes. That is sender reputation monitoring you never have to remember to run.
• Placement testing: Every slot includes one free Inbox Placement Test a month. You see whether mail landed in primary, promotions, or spam across major mailbox providers.
• Multilingual warmup: Warmup emails go out in several languages, so the activity looks normal to providers outside English-speaking regions. MXToolbox does no warmup at all.
• MCP, CLI, and API: You can run warmup and checks from Claude, Cursor, or your own scripts. MXToolbox keeps its API on the paid plans.
• Reports: Placement tests break the results down provider by provider, and Heat Score™ tracks each mailbox over time. I wait for a score of 85 before I launch a campaign on a new domain.

Let's now understand key features of the Warmforge.

Key Features

• One-Click AI Warmup: You can connect a mailbox, click once, and warmup runs on its own.
• Heat Score™: You can see a reputation score per mailbox and know when it is safe to raise volume.
• Inbox Placement Tests: You can see whether mail lands in primary, promotions, or spam across Google, Outlook, and other providers.
• Health Checks: You can watch domain health, DNS records, MX records, and blacklist status on every mailbox, with alerts when something breaks.
• Multilingual Warmup: You can run warmup activity in several languages so it looks natural to providers outside English-speaking regions.
• Premium Warmup Pool: Warmup emails move through a pool of aged Google Workspace, Microsoft 365, and SMTP mailboxes.
• API, MCP, and CLI: You can manage warmup and checks from your own scripts or AI tools.

Limitations of Warmforge

• Warmforge offers only one inbox placement test in a month.

Warmforge Pricing (Annual Billing)

All prices below are billed annually.

You can start with 1 free warmup slot and 1 free placement test. No credit card needed.

2. GlockApps

Best For: Cold email specialists and email marketing teams who want inbox placement insights and deliverability monitoring in one tool.

GlockApps is a spam testing and deliverability platform that runs on seed-list placement tests. You use it to send test emails to a seed list and see where they landed at each provider.

GlockApps stands out for two strengths. It names the spam filters that caught you, so content analysis and reputation problems stop looking like the same issue.

Plus, it bundles DMARC analytics and uptime monitoring into the same subscription instead of selling them apart.

The catch is the credit model. That means, if you're left with some credits and don't use before month end, you will lose it all.

For a closer look at the reports and how the credits work, read our full GlockApps review.

Why GlockApps is a Top MXToolbox Alternative

MXToolbox reads your DNS records. GlockApps shows where your emails land after you send test emails. Those are different answers to different questions.

The real gap is how specific the answer gets. MXToolbox can tell you something looks wrong. GlockApps tells you Barracuda flagged the message and Google did not, which points you straight at the fix.

It also runs tests on a schedule rather than waiting for you to click. MXToolbox only does that on Delivery Center.

Its free tools are worth knowing about too. The MX Checker, SPF Checker, DKIM Checker, and BIMI Checker all work without an account. You can replace part of the SuperTool before paying anything.

Key Features

• Inbox testing across 70+ mailbox providers, run manually or on a schedule, with detailed reports per provider
• Spam filter testing across Google, Barracuda, SpamAssassin, and Proofpoint, so you can see which spam filters flagged you
• Content analysis that detects broken links, excessive HTML, and other potential spam triggers
• DMARC analytics with unlimited domains on all paid plans
• IP and domain reputation monitoring plus blacklist monitoring, starting with 10 monitors on the Essential plan
• Uptime monitoring, starting with 15 monitors on the Essential plan
• Google Postmaster Tools integration for tracking domain reputation and sender reputation over time
• Free MX, SPF, DKIM, DMARC, TXT, and BIMI checkers

Limitations of GlockApps

• Spam test credits expire monthly and do not carry over.
• Using credits across different inboxes costs an extra $99, per their pricing page.
• It diagnoses problems but does not fix them. No warmup, no remediation.
• Seed-list testing suits newsletter sends better than one-to-one cold email.
• DMARC overage runs $7.50 per 100,000 messages on Essential.

GlockApps Pricing (Annual Billing)

All prices below are billed annually.

Credits expire at the end of each month and do not roll over.

3. MailReach

Best For: Teams running cold email outreach who want warmup and placement testing in one subscription.

MailReach is an email warmup and deliverability tool for cold email senders. You use it to warm mailboxes and score your cold emails before a send.

MailReach stands out for two strengths. Its spam test splits content problems from authentication and reputation problems, so you know which one to fix first.

MailReach also offers reporting of the mailboxes and domians even a non-technical marketer can act on it. The catch is the price per mailbox. It works fine at 5 mailboxes and gets expensive fast at 30.

Our full MailReach review goes deeper on the warmup network and the spam score.

Why MailReach is a Top MXToolbox Alternative

MailReach protects sender reputation. MXToolbox only reports on it. If your records are already correct and mail still lands in spam, MXToolbox has told you everything it can.

The spam score is the first real difference. MXToolbox validates your email setup and stops there. MailReach scores the actual email you are about to send, then splits a content problem from an authentication or reputation problem.

Warmup is the second difference. MXToolbox cannot repair a damaged domain, only report on it. MailReach sends warmup emails from your mailbox until the reputation recovers.

Key Features

• Warmup through a network of 30,000+ real inboxes, mostly Google Workspace and Microsoft 365 accounts
• Spam score testing for email content, authentication, and sender reputation
• Email delivery monitoring with alerts that help you protect sender reputation before it drops
• Support for Google Workspace, Microsoft 365, and SMTP mailboxes
• Blacklist monitoring and authentication checks on every connected mailbox
• API access to connect warmup and deliverability data with your existing stack

Limitations of MailReach

• No DNS lookup tools, so it does not replace MXToolbox for record checks.
• No DMARC report aggregation.
• Per-mailbox pricing gets costly past 20 mailboxes.
• No free plan, only a 7-day trial.

MailReach Pricing (Annual Billing)

There is a 7-day free trial and no free plan.

4. Folderly

Best For: Teams who want someone to fix the deliverability problem, not just report it, and can pay a premium for it.

Folderly is a deliverability platform backed by the agency Belkins. You use it when you want warmup, diagnosis, and an audit process running together.

Folderly stands out for two strengths.

• Its content analysis catches spam issues that record checkers miss entirely.
• Its team also handles the work of fixing deliverability issues with you, which is closer to a service than a dashboard.

The catch is cost and commitment. Floderly's pricing runs around $96 per mailbox per month on yearly billing, with a one-year minimum.

Our Folderly review covers the platform, pricing, and pros and cons in more detail.

Why Folderly is a Top MXToolbox Alternative

MXToolbox gives you data and leaves the fix to you. Folderly gives you data and a plan, which suits teams without a deliverability specialist on staff.

Its content analysis is the part MXToolbox has no answer for. A record checker cannot tell you that a phrase in your template is tripping filters, because the problem was never in your DNS.

The service layer goes further again. Folderly's team works the remediation with you rather than handing over a report and wishing you luck.

That is closer to hiring help than buying software.

Key Features

• Automated mailbox warmup with gradual volume ramping
• Spam triggers flagged inside email templates before you send
• Inbox placement testing across major mailbox providers and client domains
• DNS and email authentication monitoring, with email reputation tracked per domain
• Deliverability audits with recommendations that improve inbox placement over time
• Free Inbox Insights plan with two placement tests per month

Limitations of Folderly

• One-year minimum commitment on the main platform.
• Around $96 per mailbox per month puts it at the top of the category.
• Reviewers on Trustpilot report warmup volume spikes that were not approved first.
• Inbox Insights placement testing is priced separately from the main platform.
• No free trial on the full product.

Folderly Pricing (Annual Billing)

All prices below are billed yearly.

5. EasyDMARC

Best For: Teams whose main problem is DMARC compliance, SPF checkup, and getting a BIMI logo into the inbox.

EasyDMARC is an email authentication and email security platform. You use it to turn raw DMARC reports into a dashboard you can read.

EasyDMARC stands out for two strengths. Users on G2 consistently credit its intuitive dashboard, which walks you from p=none to p=reject and explains each failure in plain language. Its free tools also run without an account, including an email header analyzer.

The catch is how narrow it is. Because there is no warmup, no placement testing, and no mailbox reputation work in this platform.

Why EasyDMARC is a Top MXToolbox Alternative

MXToolbox shows you a DMARC record and tells you if the syntax is valid. EasyDMARC collects the reports that record generates and shows you who is sending as you.

That is the gap. A valid DMARC record tells you nothing about the third party spoofing your domain last Tuesday. Aggregate reports do, and EasyDMARC turns them into something a human can read.

EasySPF is the second thing MXToolbox cannot match. It flattens your SPF record automatically when you hit the 10-lookup limit, instead of just telling you that you hit it.

Its free tool set matters here too. The MX record checker, DMARC checker, domain scanner, and email header analyzer all run without a login. That makes it the closest free match to the MXToolbox SuperTool.

Key Features

• DMARC reports collected across multiple domains in one dashboard
• Guided DMARC policy changes from p=none to p=reject, with clear authentication results
• SPF records, DKIM setup, BIMI, MTA-STS, and TLS-RPT management from one place
• EasySPF flattening to overcome the 10-DNS-lookup limit on Premium and higher plans
• 35+ free email security tools with no account required, including an email header analyzer
• Custom alerts and weekly reports on your authentication records and email security

Limitations of EasyDMARC

• The free plan dropped to 1 domain, 1,000 emails a month, and 14 days of history. Reviewers were vocal about that change.
• No inbox placement testing and no warmup.
• MTA-STS and TLS-RPT sit on Premium at $71.99 a month.
• API access is Enterprise only.
• English-only interface.

EasyDMARC Pricing (Annual Billing)

Each of paid plans come with a 14-day free trial and no credit card.

6. PowerDMARC

Best For: Teams running many domains who need authentication and spoofing protection at a low per-domain cost.

PowerDMARC is an email authentication platform that focuses on domain spoofing and email fraud. You use it when you have multiple domains and more of them than budget.

PowerDMARC stands out for two strengths. It has the lowest entry price in the category and still covers more protocols than most.

It also shipped an MCP server in May 2026, so an AI client can read your live DMARC data.

The catch is the interface. There is more to learn here than in EasyDMARC, and the reports assume you already know what a forensic report is.

Why PowerDMARC is a Top MXToolbox Alternative

MXToolbox treats DMARC as one item on a long list. PowerDMARC treats it as the product, and covers MTA-STS and TLS-RPT that MXToolbox does not touch at all.

The MCP server is the second difference. It launched in May 2026 and lets Claude, Cursor, or your own agent pull live DMARC data straight from your account. Warmforge is the only other tool here with one.

White-label reporting is the third difference. You can put client-facing DMARC reports under your own brand, which matters to agencies and has no MXToolbox equivalent.

Key Features

• DMARC, SPF, DKIM, BIMI, MTA-STS, and TLS-RPT management from one dashboard
• Real-time alerts for domain spoofing attempts across client domains
• Encrypted forensic reports for investigating suspicious activity that hurts domain reputation
• SPF record flattening to overcome the 10-DNS-lookup limit
• White-label reports on email fraud and spoofing attempts, for agencies and resellers
• MCP server for connecting live DMARC data with Claude, Cursor, and other AI clients

Limitations of PowerDMARC

• Steeper learning curve than EasyDMARC for a first-time DMARC user.
• No mailbox warmup and no inbox placement testing.
• No DNS lookup tools that replace the MXToolbox SuperTool.
• Published pricing varies across sources, so confirm your tier directly.

PowerDMARC Pricing

There is a free plan, so you can test the dashboard before paying.

7. Validity Everest

Best For: Enterprise email programmes that need engagement data and deliverability analytics in the same platform.

Validity Everest is an enterprise platform for email marketers. You use it when email marketing is a major revenue channel and you need to prove inbox performance to people outside the email team.

Everest stands out for two strengths. Its Sender Score is the reputation metric that ISPs and enterprise buyers already recognise.

It also pairs deliverability with campaign engagement, so you can see whether a placement problem is a content problem underneath.

The catch is access. There is no self-serve signup and no published pricing.

Why Validity Everest is a Top MXToolbox Alternative

MXToolbox reports on infrastructure. Everest reports on the whole email programme, including how subscribers behave once mail arrives.

Engagement data is the first difference. MXToolbox can confirm a message was delivered. Everest shows whether anyone opened it, and whether weak engagement is what pushed you into spam to begin with.

Sender Score is the second difference. It is a reputation number that ISPs and enterprise buyers already recognise, which makes it easier to argue with than an internal metric.

Overall, Everest is one of the good alternatives to MXToolbox platform.

Key Features

• Sender reputation tracking with Sender Score
• Seed-list inbox placement testing across multiple mailbox providers
• Blacklist monitoring, IP status checks, and spam trap monitoring
• Subscriber engagement and email marketing performance analytics
• Detailed insights per campaign, with deliverability reports you can share outside the email team
• Google Postmaster Tools integration for reputation insights
• Sender certification program for qualifying senders

Limitations of Validity Everest

• No published pricing and no self-serve signup.
• Built for enterprise volume, so it is oversized for most outbound teams.
• No mailbox warmup.
• Reviewers mention that the platform takes time to learn.

Validity Everest Pricing

There is no free tier and no free trial, so budget for a sales conversation.

8. MailMonitor

Best For: High-volume opt-in senders who want a deliverability partner rather than another dashboard.

MailMonitor is a managed deliverability service with a seed-list analytics platform. It helps teams fix inbox placement issues when email directly affects revenue.

MailMonitor has two key advantages over MXToolbox. Its seed network is one of the widest available and matches your actual mailing list instead of a generic list. Its team also helps with remediation instead of simply giving you a report.

The main drawback is the price. Published pricing starts at $1,000 per month when billed annually, and there is no self-serve signup.

Why MailMonitor is a Top MXToolbox Alternative

MXToolbox tells you that you are on a blocklist. MailMonitor files the delisting request and works the ISP relationship for you.

That remediation layer has no MXToolbox equivalent at any tier. Getting off Spamhaus is a process rather than a checkbox, and most tools stop at telling you it happened.

Their seed network is weighted to match your own mailing list instead of a generic one. They also pull in Microsoft SNDS data, which MXToolbox does not.

One thing to check before you book a call. Their pricing page says pure cold outbound may not be a fit for them. It also rules out anyone shopping for a cheap DIY tool. The FAQ on the same page says they can help cold email senders, so ask which applies to you.

Key Features

• Seed-list placement testing across 400+ real inboxes and 90+ ISPs
• 24/7 sender reputation and email delivery monitoring on higher-tier plans
• Blocklist, IP status, and spam trap monitoring
• Google Postmaster Tools and Microsoft SNDS integration for provider-side inbox performance data
• SPF, DKIM, and DMARC authentication checks with alignment
• Managed blocklist removal and ISP reputation remediation
• Public API for accessing platform data

Limitations of MailMonitor

• Entry pricing starts at $1,000 a month billed annually.
• No free tier and no self-serve signup. Pricing comes after a consultation.
• Annual commitment, with a 90-day pilot as the only short-term option.
• The entry tier covers B2C seeds only. B2B placement testing starts on the second tier.
• Their own page says pure cold outbound may not be a fit.

MailMonitor Pricing (Annual Billing)

All prices below are billed annually.

There is no free tier. A free consultation and a 90-day pilot are offered instead.

Best MXToolbox Alternatives for Free DNS and MX Lookups [Bonus Section]

If you only need a quick lookup, these tools cover most common MXToolbox SuperTool checks.

• IntoDNS: Checks DNS records, mail servers, and email setup in one report.
• DNSChecker: Checks DNS records across 100+ DNS servers worldwide and shows the results on a map.
• GlockApps free tools: Check MX, SPF, DKIM, DMARC, TXT, and BIMI records without a login.
• EasyDMARC free tools: Provide 35+ checkers, including domain, phishing URL, and email header analysis.
• Google Admin Toolbox and dig: Free tools for quick DNS and mail server checks with no signup.
• MXToolbox free lookups: The SuperTool remains useful for DNS, MX, and blacklist checks, with one monitor available on a free account.

The limitation is simple: free lookup tools show you the current state of your email setup. They do not improve inbox placement by themselves.

How to Choose an Email Monitoring Tool

Run your shortlist through these questions before you pay for an MXToolbox alternative.

1. Do you need a one-time check or ongoing monitoring? Free tools handle one-time checks well. Ongoing monitoring usually requires a paid plan.
2. Do you own the mailboxes? Most tools require you to connect a mailbox. If you only check domains you do not control, those tools may not fit.
3. How many mailboxes will you have in six months? Per-mailbox pricing looks affordable at five mailboxes but can get expensive at 40. Calculate the cost based on the number you expect to manage.
4. Do you need inbox placement testing or just record validation? These solve different problems. Record checkers cannot show where your emails landed.
5. How many blacklists do you need to monitor? The major lists cover most real risks. Monitoring dozens of smaller lists can add noise.
6. Where should alerts go? A dashboard only helps if you remember to check it. Look for alerts through the channels your team already uses.
7. Do you need DMARC or just want it? If compliance drives the requirement, a dedicated DMARC tool may be enough.
8. Which email providers do your recipients use? If you send mostly to Gmail, Google Postmaster Tools gives you useful reputation data for free.
9. Do you need an API? Check which plan includes API access. Several tools restrict it to higher-tier plans.
10. Who fixes the problem after you find it? Some tools only report issues, while managed services help resolve them. Expect to pay more for hands-on support.
11. What will you actually pay at your mailbox count? Multiply the per-mailbox price by your expected mailbox count and sending volume. Do this before comparing headline prices.

Choose the Best MXToolbox Alternative

MXToolbox is useful for quick checks, but the alternatives offer more tools for deliverability, monitoring, and inbox placement.

For most outbound teams, Warmforge is a strong choice. It combines warmup, placement testing, and monitoring in one dashboard, starting at $9 per slot/month.

Health Checks monitor DNS, MX, and blacklist status, while Heat Score™ helps you track mailbox health.

Signup today to get started with Warmforge. You get 1 free warmup slot and 1 free placement test, with no credit card required.

FAQs About MXToolbox Alternatives

1. What are the best alternatives to MXToolbox and EasyDMARC for deliverability testing?

Warmforge, GlockApps, and MailReach are the three that test deliverability directly. MXToolbox and EasyDMARC check whether your records are correct, which is a different question. Correct records will not tell you whether Gmail dropped your email into spam, and only a seed-list placement test does that. Warmforge starts at $9 per mailbox slot a month on annual billing, with one free placement test in each slot.

2. Is there a free MXToolbox alternative with a public API and no signup?

Not one tool that does all three, so you have to pick two. IntoDNS and DNSChecker are free and need no signup, but neither publishes a public API. MXToolbox does have an API, though it sits on the paid plans rather than the free lookups. If you need programmatic checks, expect to create an account somewhere.

3. MXToolbox vs GlockApps: which is better?

They answer different questions, so the better one depends on what you are asking. MXToolbox tells you free whether your DNS, MX, and authentication records are correct. GlockApps shows where your email landed, starting at $59 a month on annual billing. Check records with MXToolbox, test placement with GlockApps, and run both if you send at volume.

4. What is the best alternative to MXToolbox for checking MX records?

IntoDNS is the closest free swap, and it needs no signup. It returns a full DNS and mail server report with a pass or fail on each check. Use DNSChecker instead when you have just changed a record and want to see how far it has spread. Both are single checks though, so neither tells you when an MX record changes next month.

5. How many blacklists should I monitor, and how often?

Five or six lists is enough, and daily is the right frequency. Spamhaus matters most by a wide margin, then Barracuda, SpamCop, and SORBS. Monitoring dozens of obscure lists mostly creates noise, and the big providers ignore many of them anyway. Always check before you scale sending volume on a mailbox, since a clean listing is the cheapest way to improve deliverability.