<dependencies>
        <dependency>
            <groupId>javax.mail</groupId>
            <artifactId>javax.mail-api</artifactId>
            <version>1.4.7</version>
        </dependency>
        <dependency >
            <groupId >javax.mail </groupId >
            <artifactId >mail </artifactId >
            <version >1.4.5 </version >
        </dependency >
        <dependency >
            <groupId >com.sun.mail </groupId >
            <artifactId >javax.mail </artifactId >
            <version >1.5.4 </version >
        </dependency >
    </dependencies>

import com.sun.mail.util.MailSSLSocketFactory;

import javax.mail.Message;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import java.util.Properties;

/**
 * Created by abbott on 8/7/17.
 */
public class ToMail {

    public static void main(String[] args) throws Exception {
        Properties prop = new Properties();
        prop.setProperty("mail.host", "stmp.qq.com");
        prop.setProperty("mail.transport.protocol", "smtp");
        prop.setProperty("mail.smtp.auth", "true");

        MailSSLSocketFactory sf = new MailSSLSocketFactory();
        sf.setTrustAllHosts(true);
        prop.put("mail.smtp.ssl.enable", "true");
        prop.put("mail.smtp.ssl.socketFactory", sf);

        //1.创建session
        Session session = Session.getInstance(prop);
        session.setDebug(true);
        //2.通过Session得到transport对象
        Transport ts = session.getTransport();
        //3.使用邮箱的用户名和密码连上邮件服务器，发送邮件
        //这里特别注意qq和其他的邮箱不一样，他这里输入的不是qq密码，而是你开启stmp服务的时候qq邮箱给你生成的一个授权码，如果输入qq密码会验证不通过
        ts.connect("smtp.qq.com", "123456", "abcdefrgdfdsd");
        //4.创建邮件
        Message message = createSimpleMail(session);
        ts.sendMessage(message, message.getAllRecipients());
        ts.close();
    }

    private static MimeMessage createSimpleMail(Session session) throws  Exception {
        //创建邮件对象
        MimeMessage message = new MimeMessage(session);
        //指明邮件的发件人
        message.setFrom(new InternetAddress("123456@qq.com"));
        //指明邮件的收件人，现在发件人和收件人是一样的，那就是自己给自己发
        message.setRecipient(Message.RecipientType.TO, new InternetAddress("1234567@qq.com"));
        //邮件的标题
        message.setSubject("只包含文本的简单邮件");
        //邮件的文本内容
        message.setContent("你好啊！", "text/html;charset=UTF-8");
        //返回创建好的邮件对象
        return message;
    }
}