Sounds great. Are you using Roundcube with a custom skin (or similar), or is it written from the ground up? Would be cool if you had some screenshots of your UI

Sounds great. Are you using Roundcube with a custom skin (or similar), or is it written from the ground up? Would be cool if you had some screenshots of your UI in any case. Which mail server software are you using? Are you doing anything to increase deliverability? Do users get their own IP address, for example?