Terms of Service

1. These terms, and who they bind

These terms govern your use of Plimsoll, A reply classifier that decides whether a domain's ramp continues, and a published daily ceiling the software enforces on the sending domains and mailboxes we operate.. They form a contract between Plimsoll, of 1204 E 6th St, Unit 3, Austin, TX 78702 (“Plimsoll”, “we”) and the company that signs up for the service (“Customer”, “you”).

The service is offered to businesses only. It is not offered to consumers, and by signing up you confirm you are acting for purposes within your trade or profession and that you are authorised to bind your company.

The person clicking through these terms is agreeing on behalf of the company, not personally. If you do not have that authority, do not proceed.

Order of precedence. Where documents conflict: (1) a signed order form or agreement between us, (2) the Data Processing Agreement, (3) these terms, (4) our Privacy Policy, (5) anything on our website.

2. What the service is

Infrastructure. The customer keeps their own sequencing tool, their own list and their own copy, and connects it to mailboxes we operate.

3. What the service is expressly not

These limits are deliberate and are part of what you are buying. They are not defects.

Not a sequencer. Plimsoll does not write, schedule or personalise a campaign, and has no editor. It carries what your tool sends, up to the ceiling.

Not a list source. We do not sell, enrich or verify prospect data, and we will not import a list.

Not unlimited. There is no plan, price or negotiation that raises a domain above its published ceiling. The ceiling is the product.

4. Your responsibilities, and how they affect the outcome

What the service delivers depends materially on things only you control. Read this section carefully; sections 9 and 10 follow from it.

Consent and compliance. The customer is responsible for having a lawful basis to contact each recipient, and for CAN-SPAM, GDPR and every equivalent that applies to them.

Their own content. Copy, subject lines and offers are the customer's. We do not review them and we do not approve them.

Honouring the ramp. A domain held flat by an unreviewed reply stays flat. Routing around it with a domain bought elsewhere is a breach of these terms.

Accurate sender identity. The customer warrants that the sending identity on each domain is a real entity that can be replied to and can be complained about.

5. Getting started, and what is free

The first domain runs free for its full 21-day ramp, including DNS and authentication setup and the reply history backfill.

Billing starts on the first day that domain reaches its published ceiling, not on the day it is provisioned.

6. Fees and what is extra

$90 per domain per month. Published, flat, and identical at one domain or forty. There are no volume tiers and no annual discount.

What is not charged. Mailboxes, DNS setup, the reply backfill, reviewer time on held replies, and any day a domain spends below its ceiling.

Term. Month to month. A canceled domain keeps sending to the end of the paid month and its suppression list is exported on request.

7. Delivery, availability and support

SMTP and IMAP. Mailboxes are reachable by the customer's own sequencing tool on standard credentials. Nothing has to run inside our interface.

The ceiling report. Each domain's ceiling, current ramp position, complaint rate and held-reply count are available daily by API and by export.

7.3 Support. Support is by email at [email protected], with a target first response of one business day. That is a target, not a guarantee.

8. The send record, and why the suppression list outlives it

Every send is attributable. Domain, mailbox, recipient, timestamp, delivery result and the reply classification if one came back.

Suppressions do not expire. An address that asked to be removed stays suppressed across every domain, after cancellation, and after the customer's account is closed.

9. Warranties, and their limits

We warrant that we will provide the service with reasonable skill and care, and that we have the right to provide it.

We give no other warranty. To the fullest extent permitted by law we exclude all implied warranties, including merchantability, fitness for a particular purpose and non-infringement.

Plimsoll does not warrant inbox placement, reply rates or campaign outcomes. It warrants that a domain never exceeds its published ceiling and that every reply is classified or held.

10. Liability

10.1 Neither party limits liability for death or personal injury caused by negligence, for fraud or fraudulent misrepresentation, or for anything else that cannot lawfully be limited.

10.2 Excluded losses. Neither party is liable for loss of profit, revenue, anticipated savings, business, goodwill or reputation, or for any indirect or consequential loss, however arising.

10.3 Specifically excluded. Plimsoll is not liable for campaign performance, for a recipient's complaint, or for a mailbox provider's independent decision about a customer's content.

10.4 Cap. Aggregate liability is capped at the fees paid for the affected domains in the twelve months before the claim.

10.5 You acknowledge that the limits in sections 9 and 10 are a reasonable allocation of risk given the price and your responsibilities under section 4, and that we would not offer the service at this price without them.

11. Confidentiality and data

Reply content and send metadata are the customer's confidential information. Free-text replies are classified by Azure OpenAI in West US 3 under zero data retention. Plimsoll reviewers read a reply only when its classification falls below the confidence floor, and each read is logged.

Processing of personal data is governed by our Privacy Policy and by the Data Processing Agreement between us, which is incorporated into these terms. Where the DPA and these terms conflict on personal data, the DPA governs.

12. Intellectual property

The customer owns their list, their copy and their sending identity. Plimsoll owns the ramp model, the classifier and the labeled reply corpus, which is held detached from customer and recipient identifiers.

You may not use our name or logo publicly, and we may not use yours, without prior written consent.

13. Term and termination

13.1 The contract starts when you sign up and continues until either party ends it.

13.2 By you. Cancel at any time, effective at the end of the current billing month, subject to any minimum term stated in section 6.

13.3 By us. We may terminate on 30 days’ notice, or immediately if you materially breach these terms and do not cure within 14 days of notice, if you become insolvent, or if your use exposes us to legal risk.

13.4 What survives. On termination we stop delivering and stop billing. You keep everything already delivered to you, and your licence to it survives. We delete or return our working copies as set out in the DPA. Sections 9, 10, 11 and 12 survive.

14. Changes to these terms

We may update these terms. Material changes take effect 30 days after we notify you by email, and if you do not accept them you may terminate before they take effect. Continuing to use the service after that date means you accept them.

15. Contact

Plimsoll, 1204 E 6th St, Unit 3, Austin, TX 78702
[email protected]

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