<em>libESMTP</em>是一个SMTP客户端，使用预配置的MTA管理电子邮件。    <br />    <br />    <ul>     <li><b>libESMTP</b> supports many SMTP extensions, notably PIPELINING (RFC 2920), DSN (RFC 1891) and SASL authentication (RFC 2554).<br /> <br /> </li>     <li><b>libESMTP</b> is efficient. Because it buffers all network traffic, when used in conjunction with a pipelining SMTP server <b>libESMTP</b> significantly increases network performance, especially on slow connections or those with high latency. Even without a pipelining server <b>libESMTP</b> offers much better performance than would be expected with a simple client.<br /> <br /> </li>     <li><b>libESMTP</b> is not intended for use as part of a program that implements a Mail Transport Agent. This is not because the code is unsuitable for use in an MTA, in fact the protocol engine is significantly better than those in many MTAs. Rather, by eliminating the need for MX lookup and next-hop determination, the design of <b>libESMTP</b> is simplified; thus goals are made achievable. Besides, such features are undesirable in a program that is not an MTA, particularly if the client is behind a firewall which blocks access to port 25 on the Internet.</li>    </ul>    <p><br />  </p>    <p><strong>项目主页：</strong><a href="http://www.open-open.com/lib/view/home/1326899365358" target="_blank">http://www.open-open.com/lib/view/home/1326899365358</a></p>