Yahoo is blocking some users of Yahoo Mail from accessing their email until they turn off their ad blocking software, reports The Washington Post. Yahoo confirmed to the publication that it is running a test for product experiences. "At Yahoo, we are continually developing and testing new product experiences. This is a test we're running for a small number of Yahoo Mail users," Yahoo's statement read. The publication added that Yahoo in its terms of service does not explicitly prohibit users from using ad blockers. However, by accepting its services users will have to agree to the statement: "Yahoo may include advertisements and that these advertisements are necessary for Yahoo to provide the Yahoo Services." As of October 2014, Yahoo has 273 million users on its email service, making it the second largest email service after Gmail. In recent times ad blockers have gained prominence as users find online advertisements increasingly invasive, annoying and difficult to close. Apple, most notably, has allowed third-party ad blockers on the updated iOS operating system for the Safari browser. However, Apple does not remove its own ads which are served in-app. Other services which want ad blocks to be removed It's also worth noting that the Washington Post also forced users to disable ad blockers to access their content in the past. City AM, a London financial newspaper, has been blocking the text of stories on Firefox browsers with ad blocking enabled since October, as indicated by this Information Week report. Ad block exceptions Adblock Plus, a…
