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Oakridge Systems provides compliant transactional email infrastructure, SMTP relay, and communication API services for UK and European businesses. GDPR-ready, PECR-compliant, and built around responsible sending from the ground up.
Every component of the Oakridge platform is designed with compliance, reliability, and transparency at its core.
High-performance SMTP routing engineered for transactional and operational communications. Consistent throughput with full delivery visibility.
Dedicated relay endpoints with mandatory TLS 1.2/1.3 enforcement. All connections are authenticated and logged for audit purposes.
RESTful API with comprehensive SDKs enabling rapid integration. Webhook-based event delivery for real-time processing pipelines.
Guided SPF, DKIM, and DMARC configuration with ongoing monitoring. Our authentication compliance score is continuously assessed.
Real-time dashboards with granular delivery reporting. Segment by domain, IP, campaign type, and sender with full event-level data export.
Automated bounce and complaint handling, suppression list management, and real-time abuse detection protect your sender reputation.
Our technical team is available to review your use case and determine whether Oakridge Systems is the right fit for your organisation.
Oakridge Systems Ltd was founded in 2021 with a clear mandate: provide responsible, compliant communication infrastructure to organisations that value trust above volume.
Oakridge Systems was established in Manchester in 2021 by a team of infrastructure engineers and compliance specialists who identified a gap in the UK market: the absence of a communication infrastructure provider that placed regulatory compliance and responsible sending at the absolute centre of its offering.
The proliferation of low-cost, permissive sending platforms had created systemic deliverability problems for legitimate businesses. Our founders set out to build the alternative: a platform where every account is reviewed, every use case is validated, and every connection is authenticated.
Today, Oakridge Systems serves a growing roster of UK and European clients across financial services, SaaS, healthcare technology, legal services, and enterprise software—all of whom require the highest standards of infrastructure reliability and compliance documentation.
Regulatory compliance is the foundation of our platform design. We do not pursue growth at the expense of legal adherence. Every new client undergoes a formal compliance review prior to account activation.
Our clients receive complete visibility into infrastructure performance, authentication status, and compliance health. We do not obscure failures or delivery issues.
Oakridge Systems infrastructure is exclusively available for opt-in, consent-based communication. There are no exceptions. Violations result in immediate and permanent suspension of services.
15 years in enterprise infrastructure. Previously Director of Platform Engineering at a leading UK payments processor. Oversees strategic direction and regulatory partnerships.
Distributed systems engineer with prior experience at Tier 1 cloud infrastructure providers. Responsible for platform architecture, resilience, and API design.
Qualified solicitor specialising in data protection law. Former ICO advisory panel contributor. Leads the client compliance review process and Acceptable Use Policy enforcement.
Dedicated IP warming, reputation management, and ISP relationship specialist. 10+ years managing enterprise sending infrastructure for UK financial clients.
Backend systems lead overseeing SMTP relay architecture, API gateway, and real-time event processing. Focused on sub-second delivery performance at scale.
Enterprise onboarding and technical integration specialist. Works directly with clients to ensure authentication is correctly configured and deliverability targets are met.
Oakridge Systems Ltd
Suite 4, Northern Quarter House
78–82 High Street
Manchester
M4 1HQ
United Kingdom
Company No. 12457863
VAT No. GB 342 8917 05
Incorporated: England & Wales
Registered: 14 March 2021
From transactional email at scale to dedicated IP allocation and compliance monitoring, the Oakridge platform is modular and built for enterprise requirements.
Our SMTP relay infrastructure is designed for enterprise transactional email. All connections are authenticated via SASL, encrypted in transit with TLS 1.2 or 1.3, and routed through monitored delivery pools with full logging. All accounts are subject to identity verification prior to activation.
The Oakridge API provides a RESTful interface for message dispatch, template management, and event retrieval. Available in JSON format with HTTPS-only endpoints. Webhook support enables real-time processing of delivery events within your own systems.
Proper domain authentication is a prerequisite for account activation on the Oakridge platform. We provide guided setup and ongoing monitoring for SPF, DKIM, and DMARC to ensure your sending domains maintain the highest reputation standards.
The Oakridge analytics platform provides comprehensive visibility into every aspect of your sending performance. From high-level delivery rates to per-message event traces, data is available in real time through the dashboard or programmatically via the reporting API.
Dedicated IP addresses are available to qualifying enterprise clients with demonstrated sending volume and compliance history. Reputation isolation protects your organisation from infrastructure-level issues affecting other senders.
The compliance layer of the Oakridge platform is not optional. Every account is automatically monitored for abuse patterns. Our human compliance team conducts regular audits of high-volume accounts. Violations of the Acceptable Use Policy result in immediate suspension.
Oakridge Systems specialises in serving organisations with complex compliance requirements, where communication infrastructure must meet the highest standards of accountability.
Banks, payment processors, insurance providers, and FCA-regulated firms require communication infrastructure with full audit trails, data residency controls, and compliance documentation suitable for regulatory submission. We support the production of data processing records and encryption attestations.
Software-as-a-Service providers need reliable transactional infrastructure for user notifications, account verification, password resets, and system alerts. Our API-first approach integrates with any technology stack, and our deliverability expertise ensures critical messages reach user inboxes.
Online retailers depend on transactional email for order confirmations, dispatch notifications, and return authorisations. Our infrastructure is designed to handle volume spikes during peak trading periods whilst maintaining authentication and compliance standards throughout.
Law firms and legal technology providers handle sensitive communications requiring confidentiality, integrity, and complete audit trails. We provide the infrastructure documentation required to demonstrate due diligence in client data handling to the SRA and ICO.
Digital health platforms and NHS-adjacent technology providers require communication infrastructure that meets stringent data handling requirements. We support pseudonymisation practices and can provide the technical documentation required for NHS DSPT assessments.
Enterprise software vendors serving large organisations need communication infrastructure with enterprise SLAs, dedicated account management, and the ability to provide supply chain security documentation to their own clients and procurement teams.
All plans include full KYC-verified onboarding, domain authentication support, and access to compliance documentation. Activation requires successful identity verification.
For growing organisations with straightforward transactional requirements. Shared IP infrastructure with authentication support.
For established businesses requiring dedicated infrastructure, enhanced deliverability, and priority compliance support.
Bespoke arrangements for large organisations with high volume requirements, custom SLAs, and complex compliance obligations.
All prices exclusive of VAT. Additional message volume available at published overage rates. Contact us to discuss your requirements. Activation subject to successful identity verification and compliance review.
Oakridge Systems infrastructure is available exclusively for opt-in, consent-based transactional communication. Unsolicited bulk email, purchased list marketing, affiliate mailing, and any other form of spam are strictly and absolutely prohibited. All new accounts undergo manual compliance review and identity verification (KYC process) before activation. Accounts found to be in violation of the Acceptable Use Policy will be suspended immediately and permanently without refund. Read the full Acceptable Use Policy →
Complete technical reference for the Oakridge Systems API, SMTP relay, and authentication configuration.
Welcome to the Oakridge Systems documentation. Before you can send any messages through our infrastructure, your account must be activated by our compliance team. This requires completion of our identity verification (KYC) process and a review of your intended use case.
API keys are not issued until account activation is complete. If you have not yet applied for access, please contact our sales team to begin the onboarding process.
Before integrating with the Oakridge Systems API or SMTP relay, ensure the following are in place:
Once your account is active, you can send a transactional message using a standard HTTP POST request to our messages endpoint:
# Send a transactional message via the Oakridge API curl -X POST https://api.oakridgesystems.co.uk/v1/messages \ -H "Authorization: Bearer YOUR_API_KEY" \ -H "Content-Type: application/json" \ -d '{ "from": "noreply@yourdomain.co.uk", "to": "recipient@example.com", "subject": "Order Confirmation #OC-48291", "text": "Thank you for your order...", "html": "<p>Thank you for your order...</p>", "idempotency_key": "order-48291-confirm-v1" }'
A successful request returns a 202 Accepted response with the assigned message identifier:
{
"status": "accepted",
"message_id": "msg_01J8HX2NR4QKPB6TYVWE3CFZD",
"queued_at": "2025-11-12T14:32:07Z"
}
Rate limits are applied per API key and per sending domain. Default limits vary by plan tier. Headers indicating current usage are included in every API response:
X-RateLimit-Limit: 1000 X-RateLimit-Remaining: 847 X-RateLimit-Reset: 1699797120
The API uses standard HTTP response codes. All errors include a machine-readable error code and human-readable message:
{
"error": {
"code": "domain_not_authenticated",
"message": "The sending domain has not passed SPF/DKIM verification.",
"docs": "https://docs.oakridgesystems.co.uk/authentication"
}
}
Every layer of the Oakridge platform is designed with security and regulatory compliance as foundational requirements, not afterthoughts.
Our internal risk and fraud prevention procedures are designed to protect the integrity of our infrastructure and the reputation of our legitimate clients.
All account applications are reviewed by a qualified compliance team member. Applications that cannot demonstrate a legitimate, opt-in use case are declined. This is a manual process — not automated.
All account holders must complete identity verification before activation. For business accounts, company registration verification is required. We do not activate anonymous or pseudonymous accounts under any circumstances.
Accounts found to be in violation of the Acceptable Use Policy are suspended immediately upon detection. There is no warning-first policy for spam or unsolicited bulk email. Suspended accounts are not reinstated.
Our team is available to discuss your infrastructure requirements, review your use case, or answer technical questions before you apply for access.
Whether you're evaluating communication infrastructure options, need documentation for a compliance review, or have a technical query about our API, our team is here to assist. Please note that all access requests require completion of our standard onboarding process.
By submitting this form you agree to our Privacy Policy. We will use your information to respond to your enquiry only. We do not share your data with third parties for marketing purposes.
Last updated: 1 January 2026 · Oakridge Systems Ltd · Company No. 12457863
This Privacy Policy explains how Oakridge Systems Ltd ("Oakridge Systems", "we", "our", "us") collects, uses, discloses, and safeguards your personal information in accordance with the UK General Data Protection Regulation (UK GDPR), the Data Protection Act 2018, and the Privacy and Electronic Communications Regulations (PECR).
Oakridge Systems Ltd is registered in England and Wales (Company No. 12457863) with its registered office at Suite 4, Northern Quarter House, 78–82 High Street, Manchester, M4 1HQ. We are the data controller for personal data collected through our website and services. Our Data Protection Officer may be contacted at dpo@oakridgesystems.co.uk.
We collect information you provide directly to us, including: name, email address, telephone number, company name, job title, and the content of communications you send us via our contact form or by email. For client accounts, we also collect identity verification information as part of our KYC process, payment information processed by our third-party payment provider, and technical data relating to API usage and message delivery events.
| Purpose | Legal Basis |
|---|---|
| Responding to enquiries | Legitimate interests |
| Providing contracted services | Performance of contract |
| Identity verification (KYC) | Legal obligation / Legitimate interests |
| Fraud and abuse prevention | Legal obligation / Legitimate interests |
| Marketing communications | Consent (where applicable) |
We retain personal data only for as long as necessary to fulfil the purposes for which it was collected or as required by applicable law. Client account data is retained for a minimum of 6 years following account closure to meet our legal obligations. Message event metadata is retained for 90 days for active accounts.
Under UK GDPR, you have the right to: access your personal data; request correction of inaccurate data; request deletion (subject to legal obligations); object to processing; request restriction of processing; data portability; and to withdraw consent where processing is based on consent. To exercise any of these rights, please contact us at dpo@oakridgesystems.co.uk.
We do not transfer personal data outside the United Kingdom or the European Economic Area without appropriate safeguards in place. All data processing occurs within UK-based infrastructure.
Our website uses strictly necessary cookies required for operation. We do not use advertising, tracking, or third-party analytics cookies without your consent.
If you have concerns about our data handling practices, please contact our DPO at dpo@oakridgesystems.co.uk. You also have the right to lodge a complaint with the Information Commissioner's Office (ICO) at ico.org.uk.
Last updated: 1 January 2026 · Oakridge Systems Ltd · Company No. 12457863
These Terms of Service ("Terms") constitute a legally binding agreement between you, the client ("Client", "you"), and Oakridge Systems Ltd, a company registered in England and Wales (Company No. 12457863) with registered office at Suite 4, Northern Quarter House, 78–82 High Street, Manchester, M4 1HQ ("Oakridge Systems"). By activating an account or using our services, you agree to be bound by these Terms.
Oakridge Systems provides communication infrastructure services including SMTP relay, transactional email delivery, communication API access, domain authentication support, and related tools ("Services"). All Services are subject to these Terms and our Acceptable Use Policy.
Account activation requires successful completion of our identity verification (KYC) process and compliance review. We reserve the right to decline any application without providing reasons. Clients must be 18 years of age or older and must be authorised to enter into legally binding contracts on behalf of any organisation they represent.
You must comply with our Acceptable Use Policy at all times. The Services may only be used for opt-in, consent-based transactional communication. Unsolicited bulk email, spam, phishing, and any communications to recipients who have not explicitly consented to receive them are strictly prohibited. Violation of the Acceptable Use Policy will result in immediate account suspension.
Subscription fees are payable monthly in advance. Overage charges are invoiced monthly in arrears. All prices are exclusive of VAT. Late payment may result in service suspension. No refunds are issued for partially used billing periods or suspended accounts.
All intellectual property rights in the Services, documentation, and related materials remain with Oakridge Systems. You are granted a limited, non-exclusive, non-transferable licence to use the Services for your own internal business purposes.
We target the uptime commitments specified in your plan documentation. Service credits may be available for downtime below committed SLA levels, subject to the conditions set out in the SLA addendum available upon request.
To the maximum extent permitted by English law, Oakridge Systems shall not be liable for indirect, incidental, or consequential damages. Our total liability to you shall not exceed the fees paid by you in the three months preceding the event giving rise to the claim.
Either party may terminate these Terms on 30 days' written notice. We may suspend or terminate your account immediately for material breach of these Terms, including violation of the Acceptable Use Policy.
These Terms are governed by the laws of England and Wales. Any disputes shall be subject to the exclusive jurisdiction of the courts of England and Wales.
Last updated: 1 January 2026 · This policy is strictly enforced. Violations result in immediate suspension.
Oakridge Systems infrastructure is exclusively available for legitimate, opt-in, consent-based transactional communication. Any use of our services to send unsolicited messages of any kind is strictly prohibited and will result in immediate and permanent account termination.
The Oakridge Systems platform may only be used to send communications where the recipient has provided clear, unambiguous, and documented consent to receive the relevant type of communication from your organisation. Permitted use cases include:
The following activities are absolutely and unconditionally prohibited on the Oakridge Systems platform. This list is not exhaustive:
All client communications must comply with the consent requirements of UK GDPR and PECR. For direct marketing communications, explicit opt-in consent is required. Pre-ticked boxes, implied consent, and legitimate interests are not valid bases for direct marketing under PECR. Clients must be able to provide documented evidence of consent upon request by Oakridge Systems or any regulatory authority.
Oakridge Systems operates a zero-tolerance policy with respect to violations of this Acceptable Use Policy. Our automated abuse detection systems and human compliance team continuously monitor all sending activity. Upon detection of a violation:
If you believe you have received an unsolicited communication from a sender using Oakridge Systems infrastructure, please report this to abuse@oakridgesystems.co.uk. All abuse reports are investigated promptly. We take reports of misuse extremely seriously and cooperate fully with law enforcement and regulatory investigations.
Questions regarding this policy should be directed to our compliance team at compliance@oakridgesystems.co.uk or by post to the registered office address.
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⚠ mail.acmecorp.co.uk DMARC policy is in monitoring mode. Upgrade to p=quarantine recommended.