Terms of Service

1. Acceptance of Terms

By accessing or using mail.cx, you agree to be bound by these Terms of Service. If you do not agree to these terms, you must not access or use the service.

2. Service Description

mail.cx provides web-based inbox services, email receiving functionality, and related developer features for testing, integration, and email workflow use cases. The service is receive-only and does not provide email sending functionality. Inboxes and related message data may expire automatically after a limited period of time. Registered users may have access to additional features, including custom domains, API access, extended retention, and other premium tools depending on their plan.

3. Accounts

You may use certain parts of the service without creating an account, where such access is made available. Some features require registration with a valid email address and password. You are responsible for maintaining the confidentiality of your login credentials and for all activities that occur under your account. We reserve the right to suspend, restrict, or disable accounts that violate these Terms of Service or otherwise pose a risk to the service or its users.

4. Acceptable Use

You agree not to use mail.cx for any unlawful, harmful, abusive, or fraudulent purpose. Prohibited uses include, but are not limited to:

• Sending, distributing, or supporting spam, phishing, malware, or other malicious content
• Fraudulent activity, impersonation, or identity theft
• Unauthorized automated registration or abusive activity on third-party services
• Violating applicable laws, regulations, or third-party rights
• Attempting to interfere with, disrupt, or attack the service infrastructure, or misusing the API, domains, or inboxes in a manner that harms the platform or other users

5. API Usage

API access is subject to usage limits, rate limits, and plan-specific restrictions. Exceeding those limits may result in throttling, temporary suspension, or access restrictions. You are responsible for keeping your API credentials secure. API tokens must not be exposed publicly or shared in an unauthorized manner. We may suspend or revoke API access in cases of abuse, misuse, security risk, or violations of these terms.

6. Abuse & Rate Limits

To protect the service and all users, mail.cx enforces rate limits and automated abuse detection. By using the service, you acknowledge and agree to the following:

• Mailbox creation, API calls, and other operations are subject to per-IP, per-account, and global rate limits. These limits vary by plan — Pro users enjoy higher quotas.
• Automated systems monitor for abnormal patterns, including excessive authentication failures, repeated invalid requests, and high-frequency operations. Accounts or IP addresses that trigger these thresholds may be temporarily or permanently banned without prior notice.
• Attempts to circumvent rate limits — such as rotating IPs, forging client identifiers, or scripting around throttling — are considered a violation of these Terms and may result in immediate suspension.
• Bans may be applied automatically or manually by our team. Banned users will receive an appropriate HTTP error response. We are not obligated to disclose specific thresholds or detection criteria.
• If you believe a ban was applied in error, contact us at service@mail.cx with your account details.

7. Service Availability

mail.cx is provided on an "as is" and "as available" basis. While we aim to provide a reliable service, we do not guarantee uninterrupted availability, error-free operation, or permanent access to any feature. We may modify, restrict, suspend, or discontinue any part of the service at any time, with or without notice.

8. Data Retention and Limitation of Liability

mail.cx is designed for short-term developer testing and email workflow usage. Messages, inboxes, and related data may expire automatically and may be permanently deleted after expiration. We do not guarantee message retention, recovery, or long-term storage. You should not rely on mail.cx for critical, sensitive, or business-essential communications. To the fullest extent permitted by law, mail.cx and its operators shall not be liable for any indirect, incidental, special, consequential, or punitive damages, or for any loss of data, emails, business, revenue, or opportunity arising out of or related to your use of, or inability to use, the service.

9. Termination

We reserve the right to suspend, restrict, or terminate access to the service, in whole or in part, at our sole discretion, with or without notice, if we believe your use violates these Terms of Service, creates legal or security risk, or may harm the service, users, or third parties.

10. Refund Policy

mail.cx offers a Pro subscription plan billed on a monthly basis through Paddle, our merchant of record. You may request a full refund within 14 days of your initial subscription payment — no questions asked. This right of cancellation applies to your initial subscription and does not apply to automatic renewals.

How to request a refund

Contact us at service@mail.cx with your registered email address, or contact Paddle directly through your payment receipt. We aim to process all refund requests within 3 business days.

What happens after a refund

• Your Pro plan will be downgraded to the Free plan immediately upon refund processing.
• API token quota will be reduced to 1. If you have more than 1 active token, excess tokens will remain but cannot be used until you are within the Free plan limit.
• Custom domains will be disabled, as custom domains are a Pro-only feature.
• Existing emails in your inboxes are not affected and will expire normally.

Cancellation

You may cancel your subscription at any time. Your Pro features will remain active until the end of the current billing period. There are no refunds on unused subscription periods.