Castle, a company specialising in fraud prevention and security, has introduced a new monthly “Fraudulent Email Domain Tracker.” This resource is a dataset listing domains that have been observed in connection with fraudulent and spam-related activities, such as the creation of fake accounts.
The tracker is intended to provide security and anti-fraud teams with data for flagging suspicious user sign-ups and assessing risk. According to the company, the list is updated monthly to reflect changes in the domain landscape used by malicious actors.
The tracker’s methodology includes a range of domains, such as:
- Known disposable email services
- Domains registered and used for temporary purposes
- Certain domains from legitimate free email providers that have been noted for a high volume of abusive sign-ups
The data is intended for use by organisations to enhance their fraud detection systems and potentially reduce the number of fraudulent accounts on their platforms.
Castle is a privately-held company that has received funding from venture capital firms, including Y Combinator and Index Ventures. It states that its technology is used by companies like Canva, Rockstar Games, and Atlassian. The release of this tracker is part of the company’s broader effort to provide tools for identifying and preventing online abuse.
