This occurs when the email2 Toolbar cannot match the email2 message to the basic email address that sent the notification message. Usually, this happens because of an error on the sender's part, but it could also be used by a hacker in an attempt to exploit the notification system. For this reason, unvalidated notification messages are never retrieved.

Technical information

Your basic email account and your email2 account are not the same thing. They are linked, in order to ensure backwards compatibility between basic email and email2.

For instance, if a user has the basic email address derek@sys-national.com, he or she can link it to an email2 account by registering. Once this is done, email2 messages sent to derek@sys-national.com will arrive at that email2 account.

When users have downloaded and installed the email2 Toolbar, they are able to send and receive email2 messages using Outlook. This is achieved by sending a basic email notification message with a hidden access code that the email2 Toolbar recognizes and uses to replace the basic email notification with the actual email2 message.

This means that the email2 Toolbar has a superficial reliance on basic email. Without the access code in the basic email, the email2 Toolbar cannot retrieve the email2 message. As a security precaution the email2 Toolbar will check that the email2 account and the basic email address match, so as to prevent the use of any forged access codes from malicious hackers.

In some cases, having a discrepancy between the email2 account and the basic email account is legitimate. Unfortunately, the email2 Toolbar cannot discern human intent and must err on the side of caution, blocking these messages from retrieval as well.

HOWEVER, because email2 messages cannot be forged and have their own internal identity verification, the email2 message will always be valid and available in the email2 Web Client. If you receive an email2 message with an unverified privacy signature, access the web client to determine whether or not the message is legitimate. If you are sending email2 messages that users cannot retrieve in Outlook, make sure that your basic email address and email2 message match.

//Edited June 09