\documentclass[a4papar]{article}
\usepackage{graphicx}
\usepackage{verbatim}
\usepackage{color}
\usepackage{indentfirst}
\pagestyle{plain}
\pagenumbering{arabic}
\topmargin=-5mm
\oddsidemargin=-5mm
\evensidemargin=-5mm
\textwidth=169mm
\textheight=240mm
\parindent=1.0em
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\renewcommand{\baselinestretch}{1.1}
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\definecolor{ins}{rgb}{0.3,0.0,0.0}
\definecolor{del}{rgb}{0.3,0.3,0.3}
\title{SPAMテスト}
\author{Piro}
\date{2008{\char'055}04{\char'055}30 05:19:43}

\begin{document}

\maketitle

わけわかめな英文字SPAMの排除テストなのですよ。

\vspace{2.5em}
\hrule width 0.95\textwidth
\vspace{-0.2em}

\begin{itemize}
\itemsep=-0.25em
\itemindent=-1.5em
\item[] {\small {\it Piro} --- スパム }{\scriptsize --- 2008{\char'055}04{\char'055}30 05:16:27}
\item[] {\small {\it Piro} --- ＳＰＡＭ }{\scriptsize --- 2008{\char'055}04{\char'055}30 05:16:40}
\end{itemize}

\end{document}