LibEtPan is a portable C mail library for accessing, parsing, and composing email and news messages.

• Mail protocols and services: IMAP, SMTP, POP3, NNTP, JMAP, ActiveSync, RSS/Atom feeds, and Gmail helpers
• Message and content handling: RFC 822/IMF, MIME, and message composition
• Local mailbox storage: Maildir, mbox, MH, and cache database support
• Security and authentication: TLS, SASL, OpenPGP, and S/MIME
• Platform support for Linux, macOS, iOS, Android, and Windows

The primary maintained build paths are configure and make on Linux and macOS, and Xcode on macOS and iOS. Android and Windows build files are also included.

Install Autoconf, Automake, Libtool, and ICU development headers, libraries, and converter data (for example, libicu-dev on Ubuntu), then build:

./autogen.sh --with-icu=yes --disable-iconv
make

The maintained Linux build and GitHub workflow use ICU for charset conversion; GNU libiconv is not required. Run the unit tests with:

make -C unittest check

Install Autoconf, Automake, and Libtool, then build:

./autogen.sh
./configure
make

Install Xcode and CMake, then prepare the workspace and dependencies:

cd build-mac
./bootstrap.sh
open libetpan.xcworkspace

Install Android NDK r23 or newer, set ANDROID_NDK, and build from build-android:

export ANDROID_NDK=$HOME/Library/Android/sdk/ndk/27.1.12297006
cd build-android
./build.sh

See build-android/README.md for dependency details, supported ABIs, and the sample app. The dependency bootstrap builds the pinned ICU submodule and bundles its static conversion libraries and data. Android no longer builds or links GNU libiconv.

Open build-windows/libetpan.sln in Visual Studio and build the solution.

See build-windows/README.md for supported Visual Studio versions and required third-party binaries.

See DEPENDENCIES.md for required and optional dependencies by platform.

See http://etpan.org/libetpan.html for more information and examples.