Please be aware that unencrypted e-mail, skype and/or phone calls are no secure ways of communication. Your communication can be easily accessed by police and intelligence services as well as corporations that developed the programs. I therefore highly recommend to switch to encrypted communication, i.e. e-mail-encryption via PGP and/or open-sourced Signal-messenger [see above]. In general I also recommend using Tor to reduce your footprint while being online.