\chapter{Implementation}

\section{Selection}
<< what to really implement within the thesis >>


\section{Authentication for incoming SMTP connections}


\section{topic02}
<< from the practice of programming: are the names good? check the significant number of characters. (intern: 31char, extern: 6char caseless; ProgC p.184) >>

\section{topic03}

\section{topic04}


\section{Work done}


\section{Test and validation}

