When you try to forward or to reply to a digitally signed e-mail message from a mail account without a digital ID in Outlook Express, you receive the following error message:

This problem occurs because Outlook Express tries to send the e-mail message with a digital signature even if there is not a digital ID present for the forwarding mail account.

To work around this problem, turn off the Digitally sign option before you reply or forward the digitally signed e-mail message. To do this, follow these steps:

1. After you click theReply or the Forwardbuttons on the e-mail message, click theTools menu.
2. Verify that the Digitally sign check box is not selected. Click to clear the Digitally sign check box if it is selected.
3. Click Send.

Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.