java发送邮件时遇到的坑

javax.mail.MessagingException: Unknown SMTP host: mail.chinamobilesz.com
        at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1959) ~                                                                                        [mail-1.4.7.jar:1.4.7]
        at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:65                                                                                        4) ~[mail-1.4.7.jar:1.4.7]
        at javax.mail.Service.connect(Service.java:317) ~[mail-1.4.7.jar:1.4.7]
        at javax.mail.Service.connect(Service.java:176) ~[mail-1.4.7.jar:1.4.7]
        at javax.mail.Service.connect(Service.java:125) ~[mail-1.4.7.jar:1.4.7]
        at javax.mail.Transport.send0(Transport.java:194) ~[mail-1.4.7.jar:1.4.7                                                                                        ]
        at javax.mail.Transport.send(Transport.java:124) ~[mail-1.4.7.jar:1.4.7]
        at com.cmsz.processOm.service.impl.EmailSendServiceImpl.sendEmail(EmailS                                                                                        endServiceImpl.java:107) ~[EmailSendServiceImpl.class:na]
        at com.cmsz.processOm.controller.WorkOrderController$SendEmail.isSendEma                                                                                        il(WorkOrderController.java:555) [WorkOrderController$SendEmail.class:na]
        at com.cmsz.processOm.controller.WorkOrderController$SendEmail.run(WorkO                                                                                        rderController.java:524) [WorkOrderController$SendEmail.class:na]
        at java.lang.Thread.run(Thread.java:745) [na:1.7.0.11]
......

// SSL加密
MailSSLSocketFactory sf = null;
    try {
      sf = new MailSSLSocketFactory();
      // 设置信任所有的主机
      sf.setTrustAllHosts(true);
      proerties.put("mail.smtp.ssl.enable", "true");
      proerties.put("mail.smtp.ssl.socketFactory", sf);
    } catch (GeneralSecurityException e) {
      e.printStackTrace();
    }