A red X appears in the message list beside an email message sent from the BlackBerry smartphone

X appears beside the email message in the message list and the following error message appears in the message status field:

Desktop email program was unable to submit message

Note: The message status field appears above the To field within the email message.

Environment 

Cause

Summary of Causes
This issue may be caused by the following:

1. The BlackBerry Router on the BlackBerry Enterprise Server has stopped responding. This occurs with BlackBerry Enterprise Server 4.0 to 5.0.
2. The Microsoft® Exchange mailbox for the BlackBerry smartphone user is full.
3. The Send As permission was revoked from the BlackBerry smartphone user's account in the Microsoft Active Directory.
4. The Send As permission has not been applied to the user account in the Microsoft Active Directory.

Resolution

Complete the appropriate resolution for the cause.

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Cause 1
The BlackBerry Router on the BlackBerry Enterprise Server has stopped responding.
Note: This occurs with BlackBerry Enterprise Server 4.0 to 5.0.

Resolution 1

Restart the BlackBerry Router by completing the following steps:
Important: Restarting certain BlackBerry Enterprise Server services delays email message delivery to BlackBerry smartphones.

1. On the computer running the BlackBerry Enterprise Server, open the Control Panel.
2. Go to Administrative Tools > Services.
3. Double-click BlackBerry Router and then click Start (see image below).
   
4. Close the Services window and then close the Control Panel.

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Cause 2
The Microsoft Exchange mailbox for the BlackBerry smartphone user is full.

Resolution 2

Make sure that the user's Microsoft Exchange mailbox has not reached or exceeded the mailbox limit.

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Cause 3
The Send As permission was revoked from the BlackBerry smartphone user's account in the Microsoft Active Directory.
Resolution 3
Complete the steps in to resolve the Send As permissions issue.

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Cause 4
The Send As permission has not been applied to the BlackBerry smartphone user account in the Microsoft Active Directory.
Resolution 4
Apply the Send As permission directly to the user object if it is not configured to inherit from the domain. Resolution 1 in  details the steps to add the Send As permission to user accounts.
Note: In some environments, users will apply the Send As permission directly to the user account, and not have it inherited from the domain level. Make sure that the Send As permission has been applied to the user account if not inherited from the domain.