I don't know how I reached the MailPile's website (some link from your sites or github?) and I would like to use it as my email client. I thought that many services now provide an integrated chat (Gmail/Hangout, Outlook/Skype,...) so I thought if DeltaChat could be the defalut MailPile chat service. You share the same privacy-oriented vision and I think that these 2 services could be well integrated. I'm just dreaming and I'm not even asking you to consider this choice as I guess it would be a huge effort, but... have you ever thought to Delta Chat as the "Skype for Business" of a free software suite? It would be great IMHO. Regards, Enrico