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unknown host exception error

gayathri murugesan
Ranch Hand

Joined: Dec 21, 2009
Posts: 32
we are retrieving mail from gmail server.we could connect to the gmail server without proxy. As there is a proxy setting in our college we couldn't connect to the gmailserver even after setting the system properties. we could connect to gmail.com from our browser but we couldn't connect from our program.

i am getting the exception as

java.net.UnknownHostException: imap.gmail.com
at com.sun.mail.imap.IMAPStore.protocolConnect(IMAPStore.java:618)
at javax.mail.Service.connect(Service.java:291)
at javax.mail.Service.connect(Service.java:172)
at EmailClient.connect(EmailClient.java:374)
at EmailClient.main(EmailClient.java:476)
by: java.net.UnknownHostException: imap.gmail.com
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.SocksSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.connect(Unknown Source)
at com.sun.net.ssl.internal.ssl.BaseSSLSocketImpl.connect(Unknown Source

at com.sun.mail.util.SocketFetcher.createSocket(SocketFetcher.java:284)
at com.sun.mail.util.SocketFetcher.getSocket(SocketFetcher.java:201)
at com.sun.mail.iap.Protocol.<init>(Protocol.java:109)
at com.sun.mail.imap.protocol.IMAPProtocol.<init>(IMAPProtocol.java:104)

at com.sun.mail.imap.IMAPStore.protocolConnect(IMAPStore.java:585)
... 4 more

please help!

Maneesh Godbole
Saloon Keeper

Joined: Jul 26, 2007
Posts: 10825

Please do not post the same question multiple times.
Original here http://www.coderanch.com/t/482092/Other-JSE-JEE-APIs/java/error-retrieving-mail-through-proxy

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