Also now covered by Arstechnica: https://arstechnica.com/information-technology/2021/01/mimecast-says-hackers-stole-a-certificate-and-used-it-to-target-its-cus

Also now covered by Arstechnica: https://arstechnica.com/information-technology/2021/01/mimecast-says-hackers-stole-a-certificate-and-used-it-to-target-its-customers/ https://arstechnica.com/information-technology/2021/01/mimec...