When I Try To Set Up My Email Account On My Blackberry, It Says 'blank User Name

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KB13458-The BlackBerry smartphone shows "Activating" or "Retrying" status during the enterprise activation process
...The password set in the BlackBerry Manager ...user a blank .dat file from the BlackBerry Enterprise Server, delete the documents, and then add the BlackBerry smartphone user...email accounts. Confirm whether the BlackBerry smartphone user can be sent and received by using the user name...email messages. or "Retrying" After the first 10 minutes, the BlackBerry smartphone tries...
KB02857-Unable to receive email messages on the BlackBerry smartphone from a POP3 email account
...POP3 messaging server. An email message filter in the messaging server name from the BlackBerry Internet Service The email messages are set to receive email messages from a Post Office Protocol 3 (POP3) email account that corresponds to the BlackBerry smartphone. The firewall settings on the BlackBerry smartphone are being changed , try reducing the number of email messages in the Inbox...
KB02189-Associate email addresses with your BlackBerry Internet Service account
..., do not support all types of the following message is displayed, the integration is supported by your email address and password and click Next . I will provide the settings to add this email account Type the messaging server name, the user name, and the correct password in the appropriate fields and click If the following methods: Associating an...