Incoming mail server not found. check mailbox settings in Nokia E63

Hello,
I am using Nokia E63 with network TATA DOCOMO (Maharashtra, India). I am having "[B]incoming mail server not found. check mailbox settings[/B]" while download email and sending. Where as I already fix email setting as follows:

Incoming Mail Server: imap.gmail.com
Access Point: TATA DOCOMO INTERNET
Mailbox name: gmail
Security (ports): SSL/TLS
PORT: Default
Outgoing Mail Servicer: smtp.gmail.com
Access Point: TATA DOCOMO INTERNET
Security (ports): StartTLS
PORT: 587

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