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Terms of Service

Last updated: July 19, 2026

These Terms of Service ("Terms") govern your access to and use of the DMARCguard platform, including our website at https://dmarcguard.io, our application at https://app.dmarcguard.io, and related services (collectively, the "Service"), operated by Developer Friendly OÜ, a private limited company incorporated in Estonia (registry code 16511866; VAT ID EE102501834) ("we", "us", or "our").

By accessing or using the Service, you agree to be bound by these Terms. If you do not agree, do not use the Service.

The Service is offered for business and professional use only. These Terms are a business-to-business agreement: by using the Service you confirm that you are acting in the course of a trade, business, craft, or profession, and not as a consumer.

1. Acceptance of Terms

By creating an account or using the Service, you represent that you have the legal capacity to enter into these Terms and that you are using the Service for business or professional purposes. If you are using the Service on behalf of an organization, you represent that you have the authority to bind that organization to these Terms.

2. Service Description

DMARCguard is an email authentication monitoring and reporting platform. The Service provides:

  • DMARC, SPF, DKIM, BIMI, MTA-STS, TLS-RPT, and ARC report processing and visualization.
  • DNS record validation and compliance scoring for email authentication protocols.
  • Alerting, trend analytics, and actionable recommendations.
  • API and MCP (Model Context Protocol) access for programmatic integration.
  • A cloud-hosted platform accessible at https://app.dmarcguard.io with API access at every tier.

We reserve the right to modify, suspend, or discontinue any part of the Service at any time with reasonable notice. If we discontinue the Service or a material paid feature, we will give at least 30 days' notice and refund prepaid fees pro-rata for the unused period.

3. Accounts

3.1 Registration

You must provide accurate and complete information when creating an account. You are responsible for maintaining the confidentiality of your account credentials and for all activities that occur under your account.

3.2 Account Security

You must notify us immediately if you become aware of any unauthorized access to your account. We are not liable for any loss resulting from unauthorized use of your account that is not attributable to our breach of these Terms or of our security obligations.

3.3 Account Termination

You may close your account at any time through the Service or by contacting us at legal@dmarcguard.io. We may close a free-tier account that has been inactive for more than 12 months, with reasonable prior notice.

4. Billing and Payments

4.1 Free Tier

The Service offers a free Community tier with limited features as described on our pricing page. Free tier access may be modified or discontinued with reasonable notice.

4.2 Paid Plans and Merchant of Record

Purchases and subscriptions are processed by Polar Software, Inc. (Delaware, USA), acting as merchant of record and authorized reseller. When you purchase a paid plan, your purchase contract is with Polar under Polar's buyer terms; these Terms continue to govern your use of the Service itself.

Paid subscriptions are billed monthly or annually as selected at the time of purchase. All fees are stated in US Dollars and exclude VAT and sales taxes, which Polar calculates and collects at checkout based on your billing location. Fees are non-refundable except as provided by Polar's refund process, these Terms, or applicable law.

Every new account starts a 30-day free Pro trial automatically at registration; no payment details are required. At the end of the trial your account automatically downgrades to the free tier unless you subscribe; report history beyond free-tier limits then becomes subject to the free-tier retention window.

Seat and plan changes: adding seats or upgrading mid-cycle results in an immediate prorated charge for the remainder of the current billing period, billed via Polar. Amounts shown in-app before you confirm are estimates; Polar's invoice is authoritative.

4.3 Price Changes

We may change our pricing with at least 30 days' notice. Price changes will take effect at the start of your next billing cycle. If you do not agree to a price change, you may cancel your subscription before the change takes effect. Price changes do not affect any founding-member rate lock or alumni discount for its promised duration.

4.4 Cancellation

You may cancel your subscription at any time. Cancellation takes effect at the end of the current billing period. You will retain access to paid features until the end of your billing period.

5. Acceptable Use

You agree not to:

  • Use the Service for any illegal purpose or in violation of applicable laws.
  • Attempt to gain unauthorized access to the Service or its underlying infrastructure.
  • Interfere with or disrupt the Service, including through excessive API calls or automated abuse.
  • Upload or transmit malicious code, viruses, or any harmful content.
  • Use the Service to send unsolicited email or facilitate spam/phishing.
  • Reverse engineer, decompile, or disassemble any part of the Service, except to the extent such restriction is prohibited by applicable law.
  • Resell or redistribute the Service without our written consent.

6. Intellectual Property

6.1 Our IP

The Service is owned by Developer Friendly OÜ and protected by intellectual property laws. The DMARCguard name, logo, and branding are our trademarks. The parse-dmarc open-source project is a separate, independently licensed project and is not part of this Service.

6.2 Your Data

You retain all rights to the data you provide to the Service, including DMARC/TLS-RPT reports and domain configurations. By using the Service, you grant us a limited license to process, store, and display your data solely for the purpose of providing the Service to you.

6.3 Feedback

If you provide feedback, suggestions, or ideas about the Service, you grant us a non-exclusive, royalty-free license to use that feedback for any purpose.

7. Limitation of Liability

TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, DEVELOPER FRIENDLY OÜ AND ITS OFFICERS, DIRECTORS, EMPLOYEES, AND AGENTS SHALL NOT BE LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, OR PUNITIVE DAMAGES, INCLUDING BUT NOT LIMITED TO LOSS OF PROFITS, DATA, USE, OR GOODWILL, ARISING OUT OF OR RELATED TO YOUR USE OF THE SERVICE.

OUR TOTAL AGGREGATE LIABILITY FOR ALL CLAIMS ARISING OUT OF OR RELATED TO THESE TERMS OR THE SERVICE SHALL NOT EXCEED THE AMOUNT PAID FOR THE SERVICE BY OR ON BEHALF OF YOU — WHETHER TO US OR TO OUR MERCHANT OF RECORD — IN THE TWELVE (12) MONTHS PRECEDING THE CLAIM.

Nothing in these Terms excludes or limits either party's liability for death or personal injury caused by negligence, for damage caused intentionally or through gross negligence, for fraud or fraudulent misrepresentation, or for any other liability that cannot be excluded or limited under applicable law.

8. Disclaimer of Warranties

THE SERVICE IS PROVIDED "AS IS" AND "AS AVAILABLE" WITHOUT WARRANTIES OF ANY KIND, WHETHER EXPRESS, IMPLIED, OR STATUTORY, INCLUDING BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT.

We do not warrant that the Service will be uninterrupted, error-free, or that it will detect all email authentication issues. The Service provides monitoring and reporting — it does not guarantee the security or deliverability of your email.

9. Indemnification

You agree to indemnify and hold harmless Developer Friendly OÜ, its officers, directors, employees, and agents from third-party claims, damages, losses, or expenses (including reasonable attorney fees) arising from your violation of these Terms, your violation of applicable law, or your infringement of the rights of a third party — provided we notify you promptly of any such claim, allow you to control the defense, and reasonably cooperate at your expense.

10. Data Protection

Where we process personal data on your behalf in providing the Service (for example, personal data contained in DMARC and TLS-RPT reports), our Data Processing Agreement ("DPA"; a countersigned copy is available at legal@dmarcguard.io) applies and is incorporated into these Terms by reference. Our current sub-processors are listed at /subprocessors/. Our Privacy Policy describes, as a notice, how we process personal data for which we are the controller.

11. Termination

We may suspend or terminate your access to the Service for: (a) material breach of these Terms; (b) non-payment; (c) a legal or regulatory requirement; or (d) a genuine risk to the security or integrity of the Service. For curable breaches we will give you notice and 30 days to cure before termination; we may suspend immediately where necessary to protect the Service or comply with law. Upon termination:

  • Your right to use the Service ceases immediately.
  • Account data is deleted as described in Section 7 of our Privacy Policy. Service and report data remain retrievable per Section 12 and are then deleted within 30 days after the retrieval period closes, per the DPA, unless we are required to retain them by law.
  • You may export your data using the Service's export features before termination, or request a data export from us.

12. Switching and Exit (EU Data Act)

In line with Regulation (EU) 2023/2854 (the "Data Act"), you may switch to another provider of a similar service, to your own infrastructure, or simply stop using the Service:

  • Initiating a switch: You may initiate switching or termination at any time through the Service or by written notice. The maximum notice period to initiate switching is two months.
  • Transitional period: Switching completes within a transitional period of 30 days. If that is technically unfeasible in a specific case, we will notify you within 14 working days of your switching request and propose a duly justified alternative transitional period of no more than seven months. You may also extend the transitional period once yourself, for a duration you consider more appropriate.
  • Data retrieval: You may export your data — report data (CSV, JSON, and original XML), domain configurations and account data (JSON via the API), and per-report downloads in-app — in structured, commonly used, machine-readable formats, at any time during the Service and for at least 30 days after termination or the end of the transitional period, whichever is later. During this retrieval period we preserve the data as it existed at termination. Derived internals (logs, caches, and derived analytics) are not exported. Switching contact: legal@dmarcguard.io.
  • Retention and downgrades: Export covers the data we hold for you at the time of export; report data outside your plan's retention window (Privacy Policy, Section 7) is deleted on schedule and cannot be exported or recovered. Canceling a paid subscription while keeping your account is not termination under this Section: the Service continues on the free tier, and report history beyond free-tier limits becomes subject to the free-tier retention window, with advance email notice before any deletion. If you delete your account, we erase your data immediately at your request in place of the retrieval period.
  • Erasure: After the retrieval period expires, we erase your data in accordance with Section 11 and our Data Processing Agreement.
  • No switching charges: We do not charge fees for switching, data export, or exit. On completion of a switch under this Section, the contract ends and prepaid fees for the unused period are refunded pro-rata via our merchant of record.

13. Governing Law and Disputes

These Terms are governed by and construed in accordance with the laws of Estonia, the jurisdiction in which Developer Friendly OÜ is incorporated.

Any disputes arising from these Terms or the Service shall first be attempted to be resolved through good-faith negotiation. If negotiation fails, the parties irrevocably submit to the exclusive jurisdiction of Harju County Court (Harju Maakohus), Tallinn, Estonia. The parties confirm that each is acting in the course of its business and that these Terms are not a consumer contract.

14. Modifications to Terms

We may update these Terms from time to time. For material changes we will give at least 30 days' advance notice by email before they take effect, and post the updated Terms on this page with a new "Last updated" date. Changes required by law, or that only add functionality, may take effect sooner.

If you do not agree to a material change, you may terminate your subscription before its effective date and receive a pro-rata refund of prepaid, unused fees (processed via our merchant of record). Continued use of the Service after the effective date constitutes acceptance of the revised Terms.

15. General Provisions

  • Severability: If any provision of these Terms is found to be unenforceable, the remaining provisions will continue in effect.
  • Waiver: Our failure to enforce any provision of these Terms does not constitute a waiver of that provision.
  • Entire agreement: These Terms, together with the Data Processing Agreement (where applicable), constitute the entire agreement between you and Developer Friendly OÜ regarding the Service.
  • Notices: Formal notices must be in writing; email is a valid means of notice. Notices to us go to legal@dmarcguard.io; notices to you go to your account owner's email address. A notice sent by email is deemed given on the date sent, provided no delivery failure is received within 24 hours.
  • Force majeure: Neither party is liable for delay or failure to perform caused by circumstances beyond its reasonable control.
  • Assignment: You may not assign your rights or obligations under these Terms without our prior written consent.

16. Contact Us

If you have questions about these Terms, contact us at:

Developer Friendly OÜ
Address: Jõe tn 3-305, Kesklinna linnaosa, 10151 Tallinn, Harju maakond, Estonia
Email: legal@dmarcguard.io