they probably use a lot of tools for a lot of reasons but they do use postgres https://www.pgcon.org/2016/schedule/attachments/426_2016.05.19%20Yandex.Mail%20s

they probably use a lot of tools for a lot of reasons but they do use postgres https://www.pgcon.org/2016/schedule/attachments/426_2016.05.19%20Yandex.Mail%20success%20story.pdf https://www.pgcon.org/2016/schedule/attachments/426_2016.05.... https://www.youtube.com/watch?v=-SS4R1sFH3c https://www.youtube.com/watch?v=-SS4R1sFH3c