邮件发送失败

com.fr.schedule.output.EmailException: javax.mail.MessagingException: Can't send command to SMTP host;

nested exception is:

    java.net.SocketException: Connection closed by remote host

    at com.fr.schedule.output.EmailNotification.doFileAction(Unknown Source)

    at com.fr.schedule.output.EmailNotification.doFileAction(Unknown Source)

    at com.fr.fs.schedule.job.DoFileActionJob.doFileAction(Unknown Source)

    at com.fr.fs.schedule.job.ViewReportletJob.executeReportByUsername(Unknown Source)

    at com.fr.fs.schedule.job.ViewReportletJob.executeScheduledOutput(Unknown Source)

    at com.fr.fs.schedule.job.ViewReportletJob.executeReport(Unknown Source)

    at com.fr.fs.schedule.job.ReportletJob.execute(Unknown Source)

    at com.fr.third.org.quartz.core.JobRunShell.run(JobRunShell.java:202)

    at com.fr.third.org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:525)

Caused by: javax.mail.MessagingException: Can't send command to SMTP host;

nested exception is:

    java.net.SocketException: Connection closed by remote host

    at com.sun.mail.smtp.SMTPTransport.sendCommand(SMTPTransport.java:1564)

    at com.sun.mail.smtp.SMTPTransport.sendCommand(SMTPTransport.java:1551)

    at com.sun.mail.smtp.SMTPTransport.issueCommand(SMTPTransport.java:1476)

    at com.sun.mail.smtp.SMTPTransport.issueSendCommand(SMTPTransport.java:1512)

    at com.sun.mail.smtp.SMTPTransport.finishData(SMTPTransport.java:1321)

    at com.sun.mail.smtp.SMTPTransport.sendMessage(SMTPTransport.java:637)

    at com.fr.base.EmailManager.send(Unknown Source)

    at com.fr.base.EmailManager.send(Unknown Source)

    ... 9 more

Caused by: java.net.SocketException: Connection closed by remote host

    at sun.security.ssl.SSLSocketImpl.checkWrite(Unknown Source)

    at sun.security.ssl.AppOutputStream.write(Unknown Source)

    at com.sun.mail.util.TraceOutputStream.write(TraceOutputStream.java:114)

    at java.io.BufferedOutputStream.flushBuffer(Unknown Source)

    at java.io.BufferedOutputStream.flush(Unknown Source)

    at com.sun.mail.smtp.SMTPTransport.sendCommand(SMTPTransport.java:1562)

    ... 16 more