Cacco Acquires Patent for Proprietary Technology of Email Check Service 'Mail Validator'
Cacco Inc. has obtained a patent for the proprietary algorithm core to its email address validation service, 'Mail Validator'. Praised for its high-accuracy judgment, the service has expanded into finance, real estate, and telecom, surpassing 2 million cumulative checks.
📋 Article Processing Timeline
- 📰 Published: April 14, 2026 at 17:40
- 🔍 Collected: April 14, 2026 at 09:01
- 🤖 AI Analyzed: April 19, 2026 at 19:11 (130h 10m after Collected)
Cacco Inc. (Headquarters: Minato-ku, Tokyo, President & CEO: Hiroyuki Iwai, Securities Code: 4166, hereafter Cacco), which provides Japan's No. 1*1 adopted fraud detection service and supports the safety of online transactions with AI and proprietary algorithms, is pleased to announce that it has acquired a patent for the core proprietary technology of its 'Mail Validator' service, which determines valid email addresses (Patent No.: 7840545).
Furthermore, highly evaluated for the high-accuracy judgment enabled by this proprietary technology, rapid adoption in a wide range of industries including finance, real estate, and telecommunications has led to the service surpassing 2 million cumulative judgment checks.
*1: Tokyo Shoko Research, 'Survey on the number of sites implementing paid fraud detection services in Japanese e-commerce sites' as of March 31, 2025.
Details of 'Mail Validator'
■ Background of Patent Acquisition: Achieving 'High-Accuracy Judgment' through Proprietary Technology
The greatest feature of 'Mail Validator' is its proprietary judgment algorithm, developed based on knowledge cultivated by Cacco through years in the fraud detection business. The advanced judgment logic provided by this service has now been recognized as a proprietary technology, leading to the acquisition of the patent.
By not stopping at mere format checks, but combining judgment logic that identifies daily-generated disposable email addresses and confirms a high probability of actual existence, it achieves high-precision judgments. This technological capability is exactly why it is chosen by financial institutions handling highly confidential information and the telecom and real estate industries with large member bases.
■ Surpassing 2 Million Cumulative Checks: Supporting Both Fraud Prevention and Operational Efficiency
Recently, fraudulent member registrations using disposable email addresses and non-delivery of communications due to input errors have become a major cost burden for companies. To address these issues, 'Mail Validator' has offered automated checking via API integration based on its patented technology, as well as self-list checking via CSV integration, at reasonable prices. Moreover, this service also has the aspect of supporting marketing through the sanitization of distribution lists. By maximizing email deliverability through regular list cleaning and preventing the 'degradation of sender domain reputation' caused by the accumulation of delivery errors, it contributes to the realization of strategic email marketing. Supported by such multifaceted value, technical reliability, and ease of implementation, we have reached the milestone of surpassing 2 million cumulative checks*2.
*2: As of April 8, 2026
■ Expanding Adoption Across Diverse Industries
Initially utilized as a countermeasure against fraudulent orders on EC sites, the adopting industries have now expanded to 'all touchpoints that acquire email addresses'.
- Finance/Credit: Eliminating fictitious information during account opening or loan applications, improving the accuracy of identity verification.
- Real Estate: Verifying validity during property inquiries, cleansing sales lists.
- Telecom/Infrastructure: Preventing non-delivery during service contracts, ensuring the reliability of contact information.
As a leading company protecting 'peace of mind and safety' in online transactions, Cacco will continue to expand the functions of 'Mail Validator'. By strengthening the security at the entry point of email checking, we will support the healthy growth of companies and the construction of a highly convenient digital environment for end users.
■ About 'Mail Validator'
[Features]
It judges the validity of email addresses from multiple angles through 4 check functions.
[Usage Image]
■ About Cacco Inc.
'O-PLUX', the fraud detection service provided by Cacco, is a cloud service that utilizes a proprietary algorithm leveraging data science such as AI to detect all kinds of fraud in online transactions in real-time, achieving damage prevention and automation of check operations. We provide Japan's No. 1*1 adopted fraud detection solution: for EC operators, from unauthorized logins to fraudulent order countermeasures; and for financial institutions and member sites, as a countermeasure against information leaks, phishing, spoofing, etc., across a series of processes from account opening to login and transactions.
Through our Data Science service, we contribute to cost reduction, operational efficiency, and profit improvement through data utilization and analysis in various industries such as manufacturing, apparel, and construction.
Furthermore, highly evaluated for the high-accuracy judgment enabled by this proprietary technology, rapid adoption in a wide range of industries including finance, real estate, and telecommunications has led to the service surpassing 2 million cumulative judgment checks.
*1: Tokyo Shoko Research, 'Survey on the number of sites implementing paid fraud detection services in Japanese e-commerce sites' as of March 31, 2025.
Details of 'Mail Validator'
■ Background of Patent Acquisition: Achieving 'High-Accuracy Judgment' through Proprietary Technology
The greatest feature of 'Mail Validator' is its proprietary judgment algorithm, developed based on knowledge cultivated by Cacco through years in the fraud detection business. The advanced judgment logic provided by this service has now been recognized as a proprietary technology, leading to the acquisition of the patent.
By not stopping at mere format checks, but combining judgment logic that identifies daily-generated disposable email addresses and confirms a high probability of actual existence, it achieves high-precision judgments. This technological capability is exactly why it is chosen by financial institutions handling highly confidential information and the telecom and real estate industries with large member bases.
■ Surpassing 2 Million Cumulative Checks: Supporting Both Fraud Prevention and Operational Efficiency
Recently, fraudulent member registrations using disposable email addresses and non-delivery of communications due to input errors have become a major cost burden for companies. To address these issues, 'Mail Validator' has offered automated checking via API integration based on its patented technology, as well as self-list checking via CSV integration, at reasonable prices. Moreover, this service also has the aspect of supporting marketing through the sanitization of distribution lists. By maximizing email deliverability through regular list cleaning and preventing the 'degradation of sender domain reputation' caused by the accumulation of delivery errors, it contributes to the realization of strategic email marketing. Supported by such multifaceted value, technical reliability, and ease of implementation, we have reached the milestone of surpassing 2 million cumulative checks*2.
*2: As of April 8, 2026
■ Expanding Adoption Across Diverse Industries
Initially utilized as a countermeasure against fraudulent orders on EC sites, the adopting industries have now expanded to 'all touchpoints that acquire email addresses'.
- Finance/Credit: Eliminating fictitious information during account opening or loan applications, improving the accuracy of identity verification.
- Real Estate: Verifying validity during property inquiries, cleansing sales lists.
- Telecom/Infrastructure: Preventing non-delivery during service contracts, ensuring the reliability of contact information.
As a leading company protecting 'peace of mind and safety' in online transactions, Cacco will continue to expand the functions of 'Mail Validator'. By strengthening the security at the entry point of email checking, we will support the healthy growth of companies and the construction of a highly convenient digital environment for end users.
■ About 'Mail Validator'
[Features]
It judges the validity of email addresses from multiple angles through 4 check functions.
[Usage Image]
■ About Cacco Inc.
'O-PLUX', the fraud detection service provided by Cacco, is a cloud service that utilizes a proprietary algorithm leveraging data science such as AI to detect all kinds of fraud in online transactions in real-time, achieving damage prevention and automation of check operations. We provide Japan's No. 1*1 adopted fraud detection solution: for EC operators, from unauthorized logins to fraudulent order countermeasures; and for financial institutions and member sites, as a countermeasure against information leaks, phishing, spoofing, etc., across a series of processes from account opening to login and transactions.
Through our Data Science service, we contribute to cost reduction, operational efficiency, and profit improvement through data utilization and analysis in various industries such as manufacturing, apparel, and construction.