Do what Fastmail did, and work with the community (generally via the IETF) to make your new standard open and compatible: https://fastmail.blog/2019/08/16/jmap

Do what Fastmail did, and work with the community (generally via the IETF) to make your new standard open and compatible: https://fastmail.blog/2019/08/16/jmap-new-email-open-standard/ https://fastmail.blog/2019/08/16/jmap-new-email-open-standar...