Version 1.0.0 · In force · EU/EEA and, where the same or equivalent law applies, UK

Terms of service

Sleinir ApS, Søledsvej 41, 4684 Toksværd, Denmark, operates the Flywheel service. We, us, and our mean Sleinir ApS.

In force: 24 April 2026 · Version 1.0.0 · https://flywheel-mail.eu

The audience for these terms is the European Union, the EEA, and, where the same or equivalent law applies, the United Kingdom. If mandatory law where you are located says a provision is void or you have non-waivable rights, that law applies to that extent. We use what you provide at sign-up to apply the correct value-added tax or other tax and to meet pre-contract and durable-medium rules where they apply to you.

Table of contents

1. What the service is

You use Flywheel to send transactional email through the service. It is not a full mailbox or mail reader. You are responsible for the lawfulness of what you send, for consent, legitimate interest, and direct marketing rules in electronic communications and commercial law, including national transpositions in the Member State or third country (including the United Kingdom) that applies to your recipients and your business. The General Data Protection Regulation (EU) 2016/679, the ePrivacy rules as transposed, and your national law are the main reference points for the relationship between you, your recipients, and the service, where they apply to you.

2. Account, credentials, and your duties

You use the access we give you (including sign-in and any application credentials) only for your organisation. You must keep your registration, tax, and billing information accurate. You are responsible for use of the account. How we process personal data is described in our Privacy policy and data processing agreement where you act as a controller. Staff access to support the platform is separate from your user access to your organisation.

3. Acceptable use and enforcement

You must not use the service, or help anyone else to use it, in a way that is unlawful, that sends email that breaches e-privacy and marketing rules, that imposes a disproportionate risk to our or others’ systems, or that is abusive, fraudulent, or harmful. We may give notice, apply sending limits, suspend, or end access as permitted by applicable Danish and EU/EEA law on e-commerce, consumers, and unfair terms, where that law applies to your contract.

4. Domains, DNS, and deliverability

Where you send with your own domain names, you are responsible for verifying them with us, for DNS records, and for email authentication (SPF, DKIM, DMARC) in line with our requirements and with sound industry practice. We operate the infrastructure and sending path; you remain responsible for the content and recipients you choose, for compliance with applicable law and with our acceptable use and product rules, and for the bounces and for regulatory or network responses to your use of the service. We may block or limit a domain that creates a disproportionate risk to the shared service or to others.

5. Price, tax, and payment

Fees, billing period, and value-added and other taxes are as shown when you subscribe and in your billing area. A payment service provider may process payment; that provider’s terms govern the payment leg of the transaction, in so far as the law so permits, between you and that provider. Subscriptions renew until you cancel in the way and time described in the product or payment flow. If you are a consumer within the meaning of the Consumer Rights Directive 2011/83/EU and Danish implementing rules, your withdrawal and termination rights for distance contracts (where they apply) are not excluded by these terms. Refund rules beyond the law, if we publish any, are as stated in our public policy. Invoices, where we issue them, follow applicable law and the order you placed.

6. The service, availability, and product changes

We run the service with the level of care that is reasonable in our sector. Downtime, security incidents, and suppliers we rely on can affect availability. We do not promise a minimum availability in these terms alone unless you have a separate written service-level agreement with us. We may add, change, or remove features. Where a change is material in price, the main subject of the contract, or a right that matters to you, we follow applicable information and consent rules in the EU, EEA, and UK where your contract is covered by them.

7. IP, licence, and your content

We and our licensors own the software, names, and documentation for the service. We give you a non-exclusive, non-sublicensable right to use the service in line with these terms, for as long as your access continues. The emails, settings, and data you put in the service remain yours, subject to the licence and processing terms we need to run the service, as set out in the DPA and the Privacy policy. You grant us a licence to use feedback you offer without royalty for improving the service unless we agree otherwise in writing.

8. Liability

Liability follows mandatory national and EU/EEA law that applies to your contract, including rules that do not allow a business to limit liability in certain cases. We do not limit or exclude our liability for death or personal injury caused by gross negligence or intent, for fraud or fraudulent misrepresentation, or in any other case a court in Denmark applying the law of the European Union, the EEA, the United Kingdom, and (where the contract or the use of the service has effects there) the law of the place where you are established or habitually resident, would not allow. For business customers, where the law allows a cap, our aggregate liability in a calendar year is limited to the fees (excluding tax) you paid in that year for the service, except for the carve-outs in the previous sentence. We do not accept liability for indirect or consequential loss, or for loss of data, profit, or business, except where a court, applying the same framework, rules that a limitation is not effective. If you are a consumer or a micro-enterprise protected by unfair-terms rules, those non-waivable liability rules in your home state and in Denmark where they apply, govern instead of a cap that the law voids.

9. Term, suspension, and the end of the service

You may cancel a subscription in the self-service way we offer, when the product has one. We may suspend or end the agreement for serious breach, non-payment, a disproportionate risk to the service, or a legal or binding order, following notice and durable-medium requirements where the law requires them. At and after the end, export and deletion of your data are as in the DPA and the Privacy policy.

10. Governing law and disputes

Governing law, which courts (or which alternative process) can hear a dispute, and the mandatory consumer, micro-enterprise, and B2B rules that the EU, EEA, and UK (where your situation is covered) apply to you, are not displaced by the general part of this contract. Which of these apply to you depends on your situation and the version of the terms in force at the time you use the service.

11. Other terms

We may assign the agreement to a successor that continues the service, with notice if the law requires. If a provision is invalid, the rest remains in force where the law allows. These terms, the DPA, and the order you place in the app are read together; if they conflict on a point, mandatory law governs, then the order, then this document, unless a different order of precedence is set out in writing between us.

Privacy policy · Data processing agreement · Sub-processors