Bongo is an easy-to-use mail and calendar system, offering a simple yet powerful user interface. The goal is to make sharing, organisation, and communication simpler, quicker, and more useful. This repository contains the maintained Python 3 and CMake based Bongo 0.7 development line. Build requirements include a C11 compiler, CMake, Python 3 with development headers, python-dateutil, vobject, nh3, GnuTLS, SQLite, Cyrus SASL, GNU Mailutils, OpenLDAP, libical, liboath, Argon2, libqrencode, libspf2, OpenDKIM, OpenDMARC, libsrs2 and the other libraries detected by CMake. Typical build and test commands are: cmake -S . -B build -DCMAKE_BUILD_TYPE=Release cmake --build build ctest --test-dir build --output-on-failure Use `-DCMAKE_INSTALL_PREFIX=/usr` for distribution packages. CPack source archives are named `bongo-.tar.*`; platform names are reserved for binary archives. TLS defaults and the explicit compatibility switches for legacy clients are documented in `docs/tls.md`. Account passwords, optional two-factor authentication, recovery codes and service-scoped app passwords are documented in `docs/authentication.md`. Incoming SPF, DKIM and DMARC verification, outgoing DKIM signing and SRS forwarding are documented in `docs/mail-authentication.md`.