There are some issues while Using DC on Tails but i found a workaround. Check this Forum Post. Having dedicated Packages or a Plugin for Pidgin Instant Messenger (which comes preinstalled with Tails) would be a lot nicer.
Expected behavior
A dedicated DC-Debian package in the Synaptic/apt-get package Manager, so Tails’ Additional Software Feature would work as intended.
Actual behavior
The only way to install DC on tails is through dpkg with the .deb package available on the official website
(which has a missing dependency: libappindicator 3-1)
afaik Delta Chat will not use Tor automatically when running on Tails - the rust core can’t handle socks proxies yet. So I’m not sure if installed Delta on Tails would yield the expected results. Has anyone checked if the traffic goes over tor, e.g. with a hidden service mail provider (like riseup.net)?