You have a computer that is running Microsoft Exchange Server 2007.
User A sends an email message to User B and selects the "Request a read receipt for this message" option.
User B deletes this email message without reading it.
In this scenario, if User A accesses his mailbox by using Microsoft Office Outlook, he receives the following read notification:
Your message was deleted without being read.
However, if User A accesses his mailbox by using a third-party application, he receives the following read notification:
The message was not read because it expired before reading at time.
This problem occurs because Exchange Server 2007 sets the PR_REPORT_TEXT property of the email message incorrectly. However, a third-party application checks the PR_REPORT_TEXT property of the email message and finds that it is incorrect.
To resolve this problem, install the following update rollup:
2279665 Description of Update Rollup 1 for Exchange Server 2007 Service Pack 3
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about the PR_REPORT_TEXT property, visit the following Microsoft website: