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error in retrieving mail through a proxy.

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.

please help!
Maneesh Godbole
Saloon Keeper

Joined: Jul 26, 2007
Posts: 10491


Please not the code tags are [code] and not <code>. Or you can use the Code button.
We have a forum dedicated for java mail. I will move this thread there for you.

What error did you get when you say [i]"we couldn't connect to the gmailserver"[i]. Can you post the stack trace?
Is there any firewall blocking the port?

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gayathri murugesan
Ranch Hand

Joined: Dec 21, 2009
Posts: 32
we get this exception

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:373)
at EmailClient.main(EmailClient.java:475)
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)
Paul Clapham

Joined: Oct 14, 2005
Posts: 18712

From the browser you connect via HTTP. So an HTTP proxy works for that. From your program you don't connect via HTTP. So an HTTP proxy doesn't work for that.

You would have to talk to the network administrators at your college to get them to open up port 993 for you.
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