Last Updated: May 20, 2026
Effective Date: Immediately
Company: Sendarix (“we”, “us”, “our”)
Website: https://www.sendarix.com
Client Dashboard: https://app.sendarix.com
Legal notices: legal@sendarix.com
These Terms govern use of Sendarix email delivery infrastructure. Entity, governing-law, venue, or address details may also be stated in an applicable order form, checkout flow, legal notice, or dashboard record.
This legal document is provided in English. If translations or localized summaries are made available, the English version controls to the maximum extent permitted by law.
By accessing or using the Service, including the Website, Client Dashboard at app.sendarix.com, APIs, SMTP endpoints, webhooks, dashboards, documentation, or any sending infrastructure, you agree to these Terms of Service and the policies incorporated by reference: the Acceptable Use Policy (AUP), Privacy Policy, and Data Processing Agreement (DPA) where applicable.
You accept these Terms when you create an Account, click to accept, pay an invoice, complete checkout, configure sending, submit traffic through SMTP or API, or otherwise use the Service. Electronic acceptance has the same effect as a signed agreement to the maximum extent permitted by law.
If you use the Service for a company, agency, reseller, customer, client, or other entity, you represent that you have authority to bind that entity. If you do not have that authority or do not agree to these Terms, you must not use the Service.
If you have a signed enterprise agreement, order form, or checkout terms with Sendarix that expressly conflict with these Terms, the signed or checkout-specific terms control for that conflict only. Otherwise, these Terms apply.
Sendarix provides email delivery infrastructure and related tools. The Service may include shared or dedicated sending infrastructure, SMTP relay, Email API, dashboards, analytics, event logs, webhooks, suppression management, routing, reputation tooling, warmup guidance, domain verification, DNS authentication guidance, and deliverability-related signals.
The Service is accessed through:
Features, limits, regions, integrations, analytics, sending pools, support channels, and configuration options vary by plan, account status, risk review, geography, infrastructure availability, and Documentation.
Sendarix may change infrastructure, routing, IP pools, upstream providers, authentication requirements, rate limits, plan limits, sending pools, warmup limits, or operational controls to protect the platform, recipients, mailbox providers, deliverability, security, legal compliance, or other customers.
Sendarix is an email infrastructure provider. We do not guarantee inbox placement, recipient engagement, sender reputation, domain or IP reputation, blocklist status, mailbox provider acceptance, open rates, click rates, campaign performance, or regulatory approval of your mail program.
Beta, preview, experimental, AI-assisted, recommendation, classification, DNS guidance, warmup guidance, deliverability suggestion, or automation features are provided for informational and operational assistance only unless a separate written agreement says otherwise. You remain responsible for decisions and actions based on them.
You must be at least 18 years old, provide accurate registration and billing information, and not be barred from using the Service under applicable law, sanctions, export controls, or our risk policies.
We may require domain verification, DNS authentication, account review, KYC/KYB-style checks, manual approval, sending warmup, plan limits, recipient, domain, country, or category restrictions, proof of consent, traffic samples, business model details, or other information before or during use. We may refuse, sandbox, pause, or revoke access based on risk, compliance, abuse, payment, security, or deliverability concerns.
You are responsible for credentials, API keys, SMTP usernames and passwords, webhook secrets, dashboard access, domain settings, DNS records, and all activity under your Account. You must use reasonable security measures, including least-privilege access, secret storage, key rotation, MFA where available, secure webhook endpoints, and prompt removal of access for Users who no longer need it.
You must not publish, embed, share, sell, lease, pool, or expose API keys, SMTP credentials, or dashboard access in a way that permits unauthorized use, hidden third-party sending, open relay behavior, limit evasion, or unmonitored traffic.
You must promptly notify us of unauthorized use, suspected compromise, credential exposure, webhook compromise, domain takeover, abnormal sending, or security incidents at abuse@sendarix.com or through support channels we provide.
You are responsible for all instructions and traffic submitted through your credentials, even if performed by your employees, contractors, affiliates, agencies, clients, integrations, systems, or compromised environments, except to the extent caused by Sendarix’s own breach of these Terms.
You must not resell, white-label, share pooled sending, operate Sendarix as a hidden backend for unauthorised third-party senders, or permit sending by customers of customers unless Sendarix expressly approves that model in writing. If approved, you remain responsible for those third parties and must bind them to equivalent restrictions.
6.1 Your role. As between you and Sendarix, you control Customer Content, recipient selection, targeting, sending instructions, legal basis, sender identity, campaign purpose, unsubscribe handling, and recipient relationships. Sendarix is not the sender of Customer Content unless we expressly state otherwise in writing.
6.2 Legal compliance. You must comply with all laws, regulations, industry rules, and mailbox provider requirements applicable to your use, including anti-spam, marketing, privacy, telecommunications, consumer protection, electronic commerce, advertising, export, sanctions, and data protection laws. This includes consent or other lawful basis, opt-out and unsubscribe rights, truthful header information, non-deceptive subject lines, sender identification, physical or contact details where required, suppression list honoring, complaint handling, and recordkeeping.
6.3 Rights and authority. You represent and warrant that you have all rights, permissions, notices, consents, lawful bases, contracts, and authorisations necessary to submit Customer Content and Customer Data to the Service and to instruct Sendarix to process and transmit them.
6.4 List sourcing. You must not use purchased, rented, scraped, harvested, appended, co-registered, third-party, or otherwise questionable lists unless the use is lawful, permission-based where required, documented, and approved by Sendarix where we request approval. You must maintain evidence of consent, opt-in source, collection method, timestamp, privacy notice, and unsubscribe handling and provide it promptly on request.
6.5 Suppressions and opt-outs. You must honor unsubscribes, opt-outs, complaints, hard bounces, suppression lists, preference changes, and mailbox provider feedback promptly. You must not re-upload, re-mail, or circumvent suppressed recipients except where legally valid and operationally appropriate.
6.6 Accuracy and identification. You must use accurate sender identities, authenticated domains, non-deceptive subject lines, truthful routing and header information, valid contact details where required, and content that does not mislead recipients about origin, purpose, affiliation, or commercial nature.
6.7 Prohibited abuse. You must not use or permit the Service for spam, phishing, malware, credential theft, fraud, impersonation, spoofing, open relay abuse, list bombing, mail bombing, scraping, harassment, illegal content, rights infringement, evasion of mailbox provider limits, evasion of Sendarix limits, reputation manipulation, blocklist evasion, or any use prohibited by the AUP.
6.8 Sensitive data. You must not upload, send, or otherwise process special category, sensitive, regulated, children’s, health, biometric, financial account, government identifier, or similarly high-risk personal data through the Service unless allowed by the DPA, required notices and consents are in place, applicable law permits it, and the data is necessary for the agreed use.
6.9 Customer websites and integrations. You are responsible for forms, signup flows, preference centers, customer websites, CRM imports, webhook endpoints, DNS configuration, tracking domains, unsubscribe pages, consent records, and downstream processing connected to your sending.
6.10 Sendarix operating license. You grant Sendarix a non-exclusive, worldwide, royalty-free license to host, reproduce, transmit, route, transform, store, cache, analyze, log, and otherwise process Customer Content and Customer Data as reasonably necessary to provide, secure, support, improve, monitor, investigate, enforce, and comply with law for the Service.
6.11 No circumvention. You must not split traffic, rotate domains, rotate credentials, use aliases, create multiple accounts, manipulate headers, or use third-party infrastructure to avoid Sendarix review, plan limits, sending limits, mailbox provider limits, enforcement actions, suppressions, or reputation controls.
Subject to these Terms and your payment obligations, we grant you a limited, non-exclusive, non-transferable, revocable right to access and use the Service during the term for your authorised business purposes.
You obtain no ownership of Sendarix software, systems, infrastructure, routing logic, IP pools, sending pools, reputation data, analytics models, Documentation, trademarks, or branding. Except as expressly allowed by law, you must not reverse engineer, interfere with, scrape outside documented APIs, copy, benchmark for competitive purposes, or build a competing product using Sendarix systems, Documentation, non-public information, or Service Data.
Fees are due as shown at checkout, in the Dashboard, on an invoice, in an Order Form, or in an applicable written agreement. Billing is managed through the Client Dashboard at app.sendarix.com unless we state otherwise.
You must keep billing information accurate and authorised. You are responsible for payment processor terms, payment method availability, bank fees, currency conversion, failed payment fees, and taxes or duties associated with your purchases where applicable.
To the maximum extent permitted by law, payments to Sendarix are final and non-refundable, including unused credits, prepaid subscriptions, setup fees, add-ons, dedicated resources, accounts suspended or terminated for abuse or risk, deliverability outcomes, customer cancellation after purchase, DNS or customer misconfiguration, third-party provider blocks, mailbox provider filtering, or failure to achieve expected campaign performance.
We do not provide prorated refunds, credits, chargeback concessions, or replacements unless mandatory consumer law requires it or Sendarix expressly agrees in writing.
No refund or credit is due for enforcement actions caused by your breach, High Risk Sending, unlawful sending, AUP violations, payment issues, sanctions risk, fraud risk, compromised credentials, customer misconfiguration, third-party integrations, recipient complaints, blocklists, mailbox provider actions, or reputation protection measures.
All use must comply with our Acceptable Use Policy (AUP), which is incorporated into these Terms. The AUP addresses spam, phishing, malware, fraud, list hygiene, authentication, security, and enforcement.
Sendarix may investigate suspected abuse, review traffic, request information, require remediation, reject messages, quarantine traffic, block recipients or domains, disable domains, IPs, webhooks, API keys, or SMTP credentials, sandbox accounts, reroute mail, throttle, pause, suspend, or terminate access where we believe it is necessary to protect the Service, recipients, mailbox providers, reputation, infrastructure, other customers, or legal compliance.
We may take enforcement action before completing an investigation where delay could cause harm. We are not required to disclose detection methods, abuse signals, provider reports, internal thresholds, or confidential third-party information.
You must comply with documented API, SMTP, webhook, dashboard, authentication, size, rate, volume, recipient, domain, country, category, plan, warmup, and sending limits. You must not probe, attack, overload, bypass, evade, reverse engineer, or interfere with the Service.
Sendarix may require SPF, DKIM, DMARC, bounce domain, tracking domain, return-path, domain verification, DNS records, sender verification, TLS, webhook signing, IP allowlisting, or other authentication and configuration requirements before or during sending.
Dedicated IPs, shared IPs, sending pools, routing decisions, throttles, limits, reputation controls, suppression enforcement, and infrastructure assignment remain controlled by Sendarix unless an applicable written agreement expressly states otherwise.
You must not operate or enable an open relay, unauthorised relay, credential-sharing service, pooled sender, or traffic source that hides the true sender, source, customer, or use case from Sendarix.
The Service is provided on an “as available” basis. Unless you have a separate written SLA signed by Sendarix that expressly states a service level commitment, Sendarix does not guarantee uninterrupted SMTP or API availability, error-free operation, delivery rates, inbox placement, mailbox provider acceptance, blocklist removal, blacklist avoidance, warmup success, reputation improvement, or campaign performance.
Delivery, analytics, opens, clicks, tracking, webhooks, event logs, bounce and complaint signals, reputation signals, and deliverability indicators are informational. They may be delayed, blocked, duplicated, incomplete, inaccurate, sampled, filtered, or unavailable due to mailbox providers, recipient settings, bots, privacy proxies, security scanners, network issues, DNS propagation, customer configuration, third-party systems, or provider behavior.
Support channels, support hours, response targets, onboarding assistance, and remediation assistance depend on your plan and our published practices. No support target is an SLA unless separately signed by Sendarix.
Sendarix may temporarily pause, throttle, reject, defer, or reroute traffic to protect delivery infrastructure, satisfy provider requirements, handle incidents, perform maintenance, or respond to abuse, even if this affects your sending speed or campaign timing.
Where Sendarix processes recipient personal data on your behalf as a processor, the DPA applies and supplements these Terms. You are responsible for lawful instructions, legal basis, notices, consents, data subject rights, and compliance for Customer Data you submit.
Where Sendarix processes account, billing, fraud, security, abuse, support, analytics, telemetry, website, payment, compliance, or Service Data for its own legitimate business purposes, Sendarix may act as controller as described in the Privacy Policy.
You must provide all notices and obtain all consents required for email tracking, open pixels, click tracking, webhooks, analytics, cookies, preference centers, and downstream processing where applicable. You are responsible for your webhook endpoints, security, payload handling, logs, onward transfers, and use of event data.
You must not use the Service to collect, infer, or process recipient data unlawfully or in a way that conflicts with your notices, consents, contracts, privacy policy, or applicable law.
Sendarix may disclose data when required by valid legal process or when we reasonably believe disclosure is necessary to protect rights, safety, security, recipients, mailbox providers, the Service, or compliance, consistent with the Privacy Policy and DPA.
Sendarix may collect and retain SMTP/API logs, request metadata, message metadata, delivery events, bounce and complaint data, unsubscribe and suppression data, webhook delivery data, authentication attempts, security logs, billing records, support records, fraud signals, abuse evidence, and operational telemetry as described in the Privacy Policy and DPA.
The standard operational retention period for SMTP/API logs, delivery event logs, message metadata, and related operational email logs is described in the Privacy Policy and DPA. Longer retention may apply for abuse prevention, security investigations, fraud, billing/tax/legal compliance, disputes, suppression/unsubscribe/bounce/complaint management, backups, legal holds, and platform integrity.
Sendarix may create aggregated, anonymised, or de-identified statistics and Service Data that do not identify you or recipients and may use them to operate, protect, benchmark, and improve the Service.
Each party may receive non-public information of the other (“Confidential Information”). The receiving party will use reasonable care to protect Confidential Information and use it only for the relationship. Exclusions include information that is public through no fault of the recipient, independently developed, or rightfully received from a third party.
Sendarix may disclose Confidential Information to employees, contractors, Affiliates, professional advisers, processors, subprocessors, payment processors, infrastructure providers, or legal authorities who need it for the Service, compliance, security, enforcement, or legal process, subject to appropriate obligations or lawful restrictions.
Sendarix and its licensors own the Service, Documentation, website, dashboard, software, infrastructure, APIs, SDKs, routing logic, reputation tools, analytics designs, operational methods, Service Data, and branding. Except for the limited rights in Section 7, no rights are granted.
You retain ownership of Customer Content. If you provide feedback, ideas, requests, suggestions, or recommendations, you grant Sendarix a perpetual, irrevocable, worldwide, royalty-free license to use them without obligation to you.
The Service may interoperate with third-party services, including payment gateways, DNS providers, registrars, CRMs, customer websites, analytics tools, cloud providers, CDN providers, security providers, mailbox providers, upstream networks, webhook endpoints, and customer integrations. Your relationship with those providers is separate, and Sendarix is not responsible for third-party services, outages, blocks, filtering, data handling, DNS propagation, configuration errors, or provider terms.
Mailbox providers, blocklists, spam filters, security vendors, privacy proxies, and recipient systems make independent decisions. Sendarix is not responsible for their filtering, blocking, throttling, deferrals, complaint reporting, tracking behavior, privacy proxy behavior, or reputation calculations.
You represent that you and your Users are not subject to sanctions or export restrictions that would prohibit use of the Service and that you will not use the Service in violation of export control, sanctions, anti-money laundering, anti-bribery, anti-terrorism, or similar laws applicable to you or Sendarix.
Sendarix may block, restrict, review, suspend, or terminate accounts, traffic, recipients, domains, countries, categories, payment methods, or use cases based on sanctions, export, fraud, abuse, payment, legal, or High Risk Sending concerns.
Sendarix may suspend, throttle, pause, sandbox, restrict, quarantine, disable, or terminate access immediately for non-payment, chargebacks, suspected fraud, AUP violations, legal risk, sanctions risk, High Risk Sending, security incidents, compromised credentials, poor list hygiene, excessive complaints or bounces, blocklist risk, provider warnings, unlawful sending, DNS or domain issues, risk to reputation, or any breach of these Terms.
Sendarix may require remediation before restoring access, including proof of consent, list source documentation, domain authentication, reduced volume, content changes, suppression cleanup, unsubscribe fixes, security remediation, payment resolution, or a sending plan acceptable to Sendarix.
You may stop using the Service at any time; closing an Account may be available in the Dashboard or by contacting support. Stopping use or closing an Account does not relieve you of fees already due and does not create refund rights.
Upon termination, your right to use the Service ceases. We may delete or retain data as described in the Privacy Policy, DPA, and Section 14, including retention needed for compliance, billing, disputes, abuse investigations, suppression integrity, security, and legal defense.
Sections that by nature should survive survive termination, including payment obligations, no-refund terms, confidentiality, intellectual property, disclaimers, limitations of liability, indemnity, data retention and investigation rights, enforcement rights, dispute terms, and general provisions.
To the maximum extent permitted by applicable law, the Service is provided “as is” and “as available” without warranties of any kind, whether express, implied, or statutory, including implied warranties of merchantability, fitness for a particular purpose, title, non-infringement, quiet enjoyment, accuracy, availability, or deliverability.
Sendarix does not warrant that the Service will meet your requirements; that SMTP, API, dashboard, webhook, DNS, analytics, tracking, reputation, or deliverability features will be uninterrupted, secure, timely, accurate, or error-free; that messages will be accepted, delivered, placed in inboxes, opened, clicked, or acted upon; that IPs or domains will avoid or exit blocklists; that reputation will improve; or that any guidance will prevent legal, compliance, deliverability, or business issues.
To the maximum extent permitted by applicable law:
Nothing in these Terms excludes or limits liability that cannot be excluded or limited under mandatory law, such as fraud, intentional misconduct, or liability for death or personal injury where applicable.
The limitations in this section apply regardless of the legal theory, whether contract, tort, negligence, strict liability, statute, or otherwise, and even if a limited remedy fails of its essential purpose.
You will defend, indemnify, and hold harmless Sendarix and its Affiliates, officers, directors, employees, contractors, processors, licensors, and providers from and against third-party claims, regulator claims, investigations, fines, penalties, damages, losses, liabilities, and reasonable costs, including attorneys’ fees, arising from or related to Customer Content, Customer Data, recipient claims, your sending practices, your products or services, your websites or forms, list sourcing, consent failures, unsubscribe failures, suppression failures, misleading headers or content, unlawful marketing, privacy or anti-spam violations, telecommunications or consumer protection violations, domain misuse, webhook misuse, customer integrations, payment disputes, chargebacks, security incidents caused by you, or your breach of these Terms or the AUP.
If you send on behalf of clients, customers, Affiliates, agencies, resellers, or other third parties, your indemnity covers their content, data, sending, recipients, claims, fines, and conduct as if they were your own. Your indemnity does not apply to the extent a claim is finally determined to have been caused by Sendarix’s gross negligence, willful misconduct, or breach of these Terms.
We may update these Terms by posting a revised version on www.sendarix.com or notifying you through the Dashboard or email where we have your address. Where reasonably practicable, we will provide notice of material adverse changes.
Changes may take effect immediately where needed for legal, regulatory, security, abuse, payment, provider, deliverability, infrastructure, or operational reasons. Continued use after the effective date constitutes acceptance unless mandatory law requires a different process. If you do not agree, you must stop using the Service.
Neither party is liable for delay or failure to perform due to events beyond reasonable control, including natural disasters, war, terrorism, civil unrest, labor disputes, government action, sanctions, epidemics, failures or restrictions of public networks, DNS, registrars, cloud providers, CDN providers, payment processors, mailbox providers, upstream networks, power, telecommunications, or security incidents not caused by the affected party.
Force majeure does not excuse payment obligations for amounts already due unless payment is legally or technically impossible because of the force majeure event.
You may not assign or transfer these Terms without our prior consent, except to an Affiliate or in connection with a merger, acquisition, corporate reorganisation, or sale of substantially all assets, provided the assignee is not a competitor, sanctioned party, or unacceptable risk and you notify us where practicable.
Sendarix may assign these Terms to an Affiliate or in connection with a merger, acquisition, reorganisation, financing, or sale of assets. The parties are independent contractors; no partnership, employment, fiduciary, franchise, joint venture, agency, or exclusive relationship is created.
These Terms, together with the policies and documents incorporated by reference, are the entire agreement regarding the Service and supersede prior oral or written understandings on that subject. If a provision is invalid or unenforceable, the remainder remains in effect. Failure to enforce a provision is not a waiver.
Unless a signed enterprise agreement says otherwise, the conflict hierarchy is: (1) signed Order Form or enterprise agreement, (2) DPA for processor processing of personal data, (3) these Terms, (4) AUP, (5) Privacy Policy for Sendarix controller processing and website/application privacy practices, (6) Documentation. A document controls only for the specific subject matter of the conflict.
Nothing in these Terms limits non-waivable rights under mandatory consumer, privacy, data protection, payment, or other laws that apply to you. If these Terms are translated, the English version controls to the extent of any inconsistency unless mandatory law requires otherwise.
These Terms are governed by the laws designated in your applicable Order Form, Checkout Terms, enterprise agreement, dashboard legal notice, or other Sendarix legal notice for your commercial relationship. If no governing law or forum is designated there, the governing law and courts will be those most closely connected to Sendarix’s establishment as notified on our website or in the Dashboard. This wording is intentionally neutral because no specific legal entity, court, or jurisdiction is stated here.
Before starting formal proceedings, each party will try to resolve disputes informally by contacting legal@sendarix.com with a concise description of the issue, requested resolution, and relevant account details, unless urgent injunctive relief, abuse, security, payment, or legal compliance requires faster action.
Mandatory consumer, privacy, and data protection rights that cannot be waived by contract remain preserved.
Legal: legal@sendarix.com
Privacy: privacy@sendarix.com
Abuse: abuse@sendarix.com
Support and billing: use the Client Dashboard at app.sendarix.com where available, or the contact channels published on the Website.
Enterprise procurement, DPAs, abuse reviews, and custom terms—we respond on business days.
Email legal@sendarix.comContact form