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<td width="90%"><font size="4" face="Verdana, Arial, Helvetica"><b>介紹</b></font></td><td width="200" align="right"><font size="1" face="Verdana, Arial, Helvetica"><nobr>   第 1 頁（共8 頁）</nobr></font></td>
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<p>在采用深入探索 JavaMail 類的入門方法前，這一章向您展示構成 API 的核心類：<code>Session</code>、<code>Message</code>、<code>Address</code>、<code>Authenticator</code>、<code>Transport</code>、<code>Store</code> 和 <code>Folder</code>。盡管您常會發現自己使用的子類在 <code>javax.mail.internet</code> 中，但上述這些類卻放在 JavaMail API的頂級包 <code>javax.mail</code> 里。</p>
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