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I am trying to configure Outlook Express 2003 with GMail (IMAP enabled)

However my Outlook is giving me this error:

ScreenShot of Error

How can I rectify this problem?

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Could you be behind a firewall that blocks access to Gmail's IMAP port? Gmail uses non-standard ports for IMAP and POP3, so your firewall may be blocking it. – Nathan Fellman Feb 6 '10 at 8:20

I prefer Thunderbird, but maybe this will help you:

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But, google suggests to go with IMAP instead of POP. – user26354 Feb 6 '10 at 8:39

Have you enabled IMAP in Gmail? Sign in to the Gmail web interface. Open the 'Forwarding and POP/IMAP' tab on your 'Settings' page, and configure IMAP. After enabling IMAP in Gmail, make sure you click 'Save Changes' so Gmail can communicate with your mail client.

From Gmail FAQ.

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