首先，下载jmail组件，可以直接安装；也可以找到jmail.dll，手动注册组件。命令行环境下，到jmail.dll所在目录，运行regsvr32 jmail.dll，c＃程序中，行首加上using jmail,如下：(点击btnsend按钮后发送邮件)
using jmail;

private void btnsend_click(object sender, system.eventargs e)
{
jmail.message jmessage=new jmail.messageclass();
jmessage.charset="gb2312";
jmessage.from="fromuser@benq.com";
jmessage.fromname= "eric lv" ;
jmessage.replyto="replayto@benq.com";
jmessage.subject="test email from jmessage";
jmessage.addrecipient("receiver@benq.com" ,"eric lv","123");
jmessage.body= "jmail 内容" ;
jmessage.mailserverusername= "eric lv" ;
jmessage.mailserverpassword= "user password" ;
jmessage.send("smtp-server",false) ;
messagebox.show("email sent successfully!");
jmessage.close() ;
}

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