Run folderlist.java with Gmail SSL POP3

Q

How to run folderlist.java in javamail1_4_7.zip with Gmail using SSL POP3 protocol? I have a valid Gmail email account.

✍: FYIcenter.com

A

folderlist.java in javamail1_4_7.zip can be used to retrieve mail folder information from Gmail mail server using SSL POP3 protocol. Here is an execution session of folderlist.java:

fyicenter>cd \local\javamail-1.4.7\demo

local\javamail-1.4.7\demo>java -version 
java version "1.8.0_45"

local\javamail-1.4.7\demo>javac -cp ..\mail.jar folderlist.java

local\javamail-1.4.7\demo>java -cp .;..\mail.jar folderlist 
   -D -L pop3s://john:password@pop.gmail.com *

DEBUG: setDebug: JavaMail version 1.4.7
DEBUG: getProvider() returning javax.mail.Provider[STORE,pop3s,com.sun.mail.pop3
.POP3SSLStore,Oracle]
DEBUG POP3: mail.pop3s.rsetbeforequit: false
DEBUG POP3: mail.pop3s.disabletop: false
DEBUG POP3: mail.pop3s.forgettopheaders: false
DEBUG POP3: mail.pop3s.cachewriteto: false
DEBUG POP3: mail.pop3s.filecache.enable: false
DEBUG POP3: mail.pop3s.keepmessagecontent: false
DEBUG POP3: mail.pop3s.starttls.enable: false
DEBUG POP3: mail.pop3s.starttls.required: false
DEBUG POP3: mail.pop3s.apop.enable: false
DEBUG POP3: mail.pop3s.disablecapa: false
DEBUG POP3: connecting to host "pop.gmail.com", port 995, isSSL true
+OK Gpop ready for requests from 71.174.32.174 z126mb196790911ywf
CAPA
+OK Capability list follows
USER
RESP-CODES
EXPIRE 0
LOGIN-DELAY 300
TOP
UIDL
X-GOOGLE-RICO
SASL PLAIN XOAUTH2 OAUTHBEARER
.
DEBUG POP3: authentication command trace suppressed
DEBUG POP3: authentication command failed
QUIT
+OK Bye z126mb196790911ywf
Exception in thread "main" javax.mail.AuthenticationFailedException: [AUTH] User
name and password not accepted.
        at com.sun.mail.pop3.POP3Store.protocolConnect(POP3Store.java:207)
        at javax.mail.Service.connect(Service.java:295)
        at javax.mail.Service.connect(Service.java:176)
        at javax.mail.Service.connect(Service.java:125)
        at folderlist.main(folderlist.java:107)

The output shows that:

  • The mail.jar contains JavaMail API classes like javax.mail.Service.
  • The mail.jar contains POP3 implementation classes like com.sun.mail.pop3.POP3Store.protocolConnect.
  • JavaMail 1.4.7 supports SSL POP3 protocol.
  • imap.gmail.com server supports SSL POP3 protocol on port 995.
  • The authentication failed exception is expected, because the account name and password are invalid. If you provide your real gmail account name and password, you will get correct result.

Back to FAQ for JavaMail API and Implementations.

2016-01-25, 1277👍, 0💬