An SMTP library written in C++ for Qt. Allows applications to send emails (MIME with text, html, attachments, inline files, etc.) via SMTP. Supports SSL and SMTP authentication.

mailio is a cross platform C++ library for MIME format and SMTP, POP3, IMAP protocols. It is based on the standard C++ 17 and Boost library.

VMime Mail Library

🗃️ A C++ library for work with mime-types

A reactor-based multi-threaded network library

Small C++ library for mime type identification using file extensions

SMTP/ESMTP/POP3 server zonder bullshit

An Implementation of CAdES, XAdES, PAdES and ASiC for Windows in C++

static MIME information for C/C++

iOS Port of Mimetic (http://www.codesink.org/mimetic_mime_library.html)