Privacy Policy
Last updated: March 23, 2026
1. General Overview
At mails.expert, we recognize that email addresses and related data may constitute personal data. We are committed to handling such data lawfully, fairly, and transparently.
This Privacy Policy explains how we collect, use, process, and protect information in connection with your use of our website, API, and email validation services.
By using mails.expert, you acknowledge and accept the practices described in this policy.
2. Identity of the Service Provider
mails.expert is operated by an individual entrepreneur (FOP) registered in Ukraine.
For any privacy-related inquiries, you may contact us at:
info@mails.expert
3. Nature of the Service
mail.expert provides technical email validation services.
The service is designed to analyze email addresses for deliverability and technical correctness.
We do not send emails to validated addresses and do not interact with end users of those email addresses.
4. Data We Collect
We collect only data that is necessary to provide and secure the service.
When you use mails.expert, we may process:
Email addresses submitted for validation, account-related data such as your login email, and technical information including IP address, browser type, device information, and request metadata.
If you make a payment, transaction-related information is processed by third-party providers such as Monobank, PayPal, or cryptocurrency payment processors. We do not store full payment credentials.
In addition, we collect limited usage data such as API activity, timestamps, and system logs, which are necessary to maintain performance and security.
5. Purpose of Data Processing
We process data strictly within the scope of providing our services.
This includes delivering validation results, maintaining system integrity, detecting abuse, preventing fraud, and ensuring the stability of our infrastructure.
We may also process limited data for accounting, legal compliance, and internal analytics.
Importantly, we do not use customer email lists for marketing purposes, enrichment, or resale.
6. Legal Basis for Processing
Where applicable, we rely on the following legal grounds:
Performance of a contract (providing the service you requested)
Legitimate interests (fraud prevention, system security, service improvement)
Compliance with legal obligations
If you are submitting email data, you are responsible for ensuring that you have a lawful basis to process that data.
7. Data Sharing
We do not sell, rent, or publicly disclose personal data.
However, in order to operate the service, we may share limited data with trusted third-party providers, including:
Infrastructure providers (hosting and servers), payment processors, and analytics services such as Google Analytics (via Google Tag Manager).
Such providers are used solely for service operation and are required to handle data in accordance with applicable data protection standards.
We may also disclose data where required by law or in response to valid legal requests.
8. International Data Transfers
Due to the nature of cloud-based services, data may be processed in jurisdictions outside your country.
By using mails.expert, you acknowledge that such transfers may occur as part of normal service operation.
9. Data Retention
We retain data only for as long as necessary to fulfill the purposes described in this policy.
Email validation data may be stored temporarily to provide results and ensure service functionality.
System logs may be retained for security, debugging, and abuse prevention.
Billing records are retained in accordance with applicable legal requirements.
We aim to minimize data retention wherever reasonably possible.
10. Data Deletion
You may request deletion of your data at any time.
We will process such requests within a reasonable timeframe, unless retention is required for legal or security purposes.
Requests can be sent to:
info@mails.expert
11. Data Subject Rights
Depending on your jurisdiction, you may have the right to request access to your data, correction of inaccuracies, deletion, restriction of processing, or data portability.
We will make reasonable efforts to comply with such requests in accordance with applicable law.
12. Cookies and Analytics
Our website uses cookies and similar technologies to improve performance and understand usage.
We use tools such as Google Analytics, implemented through Google Tag Manager.
These tools may collect anonymized or pseudonymized usage data.
13. Security
We apply commercially reasonable technical and organizational safeguards to protect data against unauthorized access, misuse, loss, or disclosure.
These measures include encrypted connections, access control, monitoring, and abuse detection.
However, no system can be guaranteed to be completely secure.
14. Third-Party Services
Our service may rely on external providers for infrastructure, payments, and analytics.
We do not control the policies of such providers and encourage users to review their respective privacy practices.
15. Changes to This Policy
We may update this Privacy Policy from time to time.
The updated version will be published on this page with a revised "Last updated" date.
Continued use of the service constitutes acceptance of the updated policy.
16. Contact
If you have any questions regarding this Privacy Policy or data protection practices, please contact: