Could not connect to SMTP host: smtp.qq.com, port: 25;

需要增加配置：

properties.setProperty("mail.smtp.socketFactory.fallback", "false");
properties.setProperty("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
//設置ssl端口
properties.setProperty("mail.smtp.socketFactory.port", handleStaticMailEntity.getMailPort());