Introducing a case where the previously unclear situation regarding spam email countermeasures has become understandable!
We would like to introduce a case study on the implementation of "DMARC/25" at A2 Corporation. The company had previously set up SPF records as a measure against spoofed emails, but they were unable to ascertain the actual number of spoofed emails that failed authentication. In order to confirm the status of their measures against spoofed emails, they chose our "DMARC/25," which offers complete support in Japanese, as many DMARC analysis services are foreign products. By implementing "DMARC/25," they were able to understand the status of SPF authentication and identify issues related to third-party signatures and email forwarding. This has been useful for their future measures against spoofed emails. [Challenges Before Implementation] ■ Although they believed that the SPF record settings should have mitigated spam emails with spoofed sender addresses, they did not know how many emails were actually failing authentication. *For more details, please refer to the PDF document or feel free to contact us.
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【Effects After Implementation】 ■ It was confirmed and corrected that some emails sent from the system were rejected due to SPF authentication failures based on the From address. ■ It has become possible to identify issues related to third-party signatures and email forwarding. *For more details, please refer to the PDF document or feel free to contact us.
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For more details, please refer to the PDF document or feel free to contact us.
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Company information
TwoFive Inc. was established in 2014 by a group of engineers with many years of experience in building and supporting large-scale email system infrastructures for major ISPs, ASPs, mobile operators, and large corporations, focusing on email system construction, email security, and thread intelligence as its core business. We have combined technical services with excellent products/solutions from both domestic and international sources. Currently, we are collaborating with industry associations and related service vendors to address new challenges not only in email systems but also in various messaging fields. Additionally, leveraging our extensive network with overseas vendors, we are introducing excellent products and solutions that support Japan's digital transformation (DX) to the Japanese market, beyond just the messaging field. In addition to our headquarters in Tokyo, we have a branch in Hanoi, Vietnam, where we conduct development and support. As a group of engineers with many years of experience in the email system infrastructure of major ISPs, ASPs, and mobile operators, we provide consulting on the design and construction of email systems, as well as security and other related matters. Please feel free to contact us if you have any requests.
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