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Mailhardener — Cybersecurity

from €19/mo

Mailhardener (Cybersecurity): Secure your email with Mailhardener: manage SPF, DKIM, DMARC, MTA-STS, and improve deliverability. Pricing: from €19/mo. (data verified August 2026)

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About Mailhardener

What is Mailhardener?

Mailhardener is a domain email security platform that helps you implement and monitor email authentication standards—SPF, DKIM, DMARC, MTA-STS, and BIMI—to prevent fraud, spam, and impersonation. It also helps improve email deliverability by showing you security results and offering actionable insights.

Who is it for?

Ideal for small to large businesses, IT administrators, and managed service providers (MSPs) that want to secure their email domains and ensure legitimate emails reach inboxes. It's also great for nonprofits and personal domains with low volume, thanks to its free plan. Not suited for individuals seeking a full-featured email client—Mailhardener focuses on domain-level security, not email hosting.

Real use cases

Control which third-party services (like marketing platforms or payment providers) can send email on your behalf by managing sender policies. Monitor DMARC reports to detect fraudulent activity, and use MTA-STS to enforce encrypted email transport. Improve deliverability by reducing the chance of your emails being flagged as spam.

Key features

  • SPF, DKIM, and DMARC management — Set up and monitor email authentication policies to prevent spoofing and improve trust.
  • MTA-STS policy hosting — Enforce TLS encryption for email in transit with hosted policies.
  • BIMI asset hosting — Display your brand logo in supported email clients by hosting BIMI assets.
  • DMARC aggregation (ruf/rua) — Receive and analyze DMARC failure and aggregate reports.
  • SMTP TLS Reporting — Monitor and report on transport encryption failures.
  • DNS monitoring — Automatically check your DNS records for security compliance and issues.
  • Multi-user access with SSO/2FA — Manage team access securely with single sign-on and two-factor authentication (on paid plans).

SaaSpartout Score

7.7 /10
Ease of use 8.0
Features depth 8.5
Value for money 7.5
Support quality 7.0
Integrations 6.5
Scalability 8.0
Documentation 7.5
Onboarding speed 8.5

Editorial score from our review methodology — not user ratings.

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Mailhardener Pricing

Mailhardener pricing: from €19/mo.

For comparison: the median starting price in Cybersecurity is $9.99/month, measured across 116 tools we track. See the full SaaS Pricing Index →

Free

Free for personal or evaluation use. Single domain, up to 1 month data retention.

Standard (€19/month or €199/year)

For small businesses. Includes up to 10 domains, 3 months data retention, multi-user access, SSO/2FA/IAM, DMARC aggregation, SMTP TLS aggregation, hosted MTA-STS, BIMI asset hosting, DNS monitoring, and technical support.

Large (€99/month or €999/year)

For larger organizations. Up to 100 domains, 1 year data retention, all Standard features, plus payment by invoice.

Enterprise (Quote on request)

All Large features, no domain limit, no data retention limit, custom contracts, assisted onboarding, vendor assessment, private instance option, eIDAS, and regulatory compliance agreements (DORA, HIPAA BAA, etc.).

Free trial? A free plan is available for personal and evaluation use. See plans for commercial use.

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Frequently asked questions

Is Mailhardener free?
Yes, Mailhardener offers a free plan for personal or evaluation use, allowing a single domain with up to one month of data retention.
How much does Mailhardener cost?
Paid plans start at €19 per month (or €199 per year) for the Standard plan, and €99 per month (or €999 per year) for the Large plan. Enterprise pricing is quote-based.
What is Mailhardener used for?
Mailhardener is used to manage email security standards like SPF, DKIM, DMARC, MTA-STS, and BIMI, helping to prevent email fraud, impersonation, and improve deliverability.
Who is Mailhardener best for?
It's best for businesses, IT admins, and MSPs that need to secure email domains and monitor email authentication. It's also free for personal and evaluation use.
What are top alternatives to Mailhardener?
Alternatives include Valimail, OnDMARC (RedSift), EasyDMARC, and Dmarcian, which offer similar DMARC and email authentication management features.
What is the key limitation of Mailhardener?
The free plan is limited to a single domain and one month of data retention, while paid plans offer more domains and longer retention. Some advanced features, like SSO, are only available on paid plans.

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