\documentclass[a4paper]{letter}

\usepackage{times}
\usepackage[dvips]{graphicx}
\usepackage{graphicx}
%\usepackage{fullpage}

\address{%
Your company address \\
Country}

\signature{Your company\\Contact person}

\begin{document}

\begin{letter}{%
Alan Chan \\
Linux Center (HK) Ltd. \\
Unit 318b\&C, 3rd Floor \\
Tech Centre, \\
72 Tat Chee Avenue \\
Kowloon Tong \\
Hong Kong.}

\opening{Dear Mr Chan,}

We, at My Company, fully agree with the request of the
\textit{Aegir CMS Business Community} to move the latest Aegir CMS
code derived from Nadmin Studio under the GNU General Public License
(GPL).


We were Hong Kong Linux Center (HKLC) partners since DATE.

\closing{Sincerely yours}

\end{letter}
\end{document}