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, libical and the libraries detected by CMake. Optional mail authentication support is enabled when libspf2, OpenDKIM, OpenDMARC and libsrs2 are installed. 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`.