Posteo (the secure email service) uses Roundcube as webmail software johayek 5 years ago https://posteo.dehttps://en.wikipedia.org/wiki/Posteohttps://en.wikipedia.org/wiki/Roundcubehttps://www.bestvpn.com/guides/posteo-secure-email-review/#the-posteo-roundcube-clienthttps://github.com/posteohttps://github.com/posteo/Roundcube-Plugin-SieveRules-Managesieve Share this: