java.net.socketTimeout.Exception：读取超时

Question

即使成功连接到主机后，我仍然遇到以下错误： ................................................... ...........................

DEBUG: setDebug: JavaMail version 1.5.5
DEBUG: getProvider() returning javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Oracle]
DEBUG SMTP: need username and password for authentication
DEBUG SMTP: useEhlo true, useAuth true
DEBUG SMTP: trying to connect to host "smtp.mail.yahoo.com", port 587, isSSL false
220 smtp.mail.yahoo.com ESMTP ready
DEBUG SMTP: connected to host "smtp.mail.yahoo.com", port: 587

DEBUG SMTP: exception reading response, THROW: 
java.net.SocketTimeoutException: Read timed out
    at java.net.SocketInputStream.socketRead0(Native Method)
    at java.net.SocketInputStream.read(Unknown Source)
    at com.sun.mail.util.TraceInputStream.read(TraceInputStream.java:124)
    at java.io.BufferedInputStream.fill(Unknown Source)
    at java.io.BufferedInputStream.read(Unknown Source)
    at com.sun.mail.util.LineInputStream.readLine(LineInputStream.java:92)
    at com.sun.mail.smtp.SMTPTransport.readServerResponse(SMTPTransport.java:2331)
    at com.sun.mail.smtp.SMTPTransport.ehlo(SMTPTransport.java:1620)
    at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:703)

................................................................................
I am using javamail 1.5.5 jar. I took the code from github https://github.com/FoulerBenny/SampleProject/blob/master/src/main/java/com/genericLibraries/EmailAttachmentSender.java

我的意图是使用SSL，但是首先尝试这种方式，因为SSL花费的时间太长了 。