I've been customer of mailbox.org for just over a year now. I can't assess the quality of their security, or the lengths they'd go to protect customer privacy,

I've been customer of mailbox.org for just over a year now. I can't assess the quality of their security, or the lengths they'd go to protect customer privacy, though they seem to know what they're doing. We had a Linux consultant from Heinlein Support at the last place I worked for, and he did his job very well. I'm also pretty happy with the Card+CalDav-offerings from mailbox.org. With their customer support, however, im rather disappointed: mailbox.org offers what they call "Familienaccounts" (non-commercial accounts, meant to share, among other things, calendars and contacts with one another [0]). Grouping existing accounts into "Familenaccounts" by means of contacting their support team used to be a feature that was offered (and advertised) by mailbox.org, and a feature that I've used for two of my family members in the past. For some technical reason or other, mailbox.org is unable to convert existing accounts into Familienaccounts any more. This wouldn't be that much of a problem (workaround was to backup data, cancel one account, get that account's credit refunded, ask them to remove that account from their list of blocked accounts, recreate that account as a "Familienaccount", pay for the new account and restore the backed up data). What rubbed me the wrong way was that it took a month of to and fro emailing with mailbox.org support just to get that information (while they still advertised being able to convert accounts on their website). When we decided to implement the workaround, it took another month from cancelling the old account to getting the new one working, with my wife unable to receive emails for some time inbetween. I will continue to use mailbox.org, but in my opinion they really need to improve their support. [0] https://support.mailbox.org/knowledge-base/article/familien-accounts-alle-fragen-antworten https://support.mailbox.org/knowledge-base/article/familien-...