Article ID: 202481
Article Last Modified on 1/23/2007
APPLIES TO
- Microsoft Outlook Express 5.0
This article was previously published under Q202481
For information about the differences between Microsoft Outlook Express and Microsoft Outlook e-mail clients, click the following article number to view the article in the Microsoft Knowledge Base:
257824 OL2000: Differences Between Outlook and Outlook Express
SYMPTOMS
When you receive an e-mail message that is digitally signed by the sender, you may receive the following warning message on the Security line (below the Subject line):
Digitally signed - signature invalid
After you open the mail message, the following message may be displayed:
Security Help
Digitally Signed Message
This message has been digitally signed by the sender.
Signed e-mail from others allows you to verify the authenticity of a
message -- that the message is from the supposed sender and that it has
not been tampered with during transit. Signed mail messages are
designated with the signed mail icon.
Any problems with a signed message will be described in a Security
Warning which may follow this one. If there are problems, you should
consider that the message was tampered with or was not from the supposed
sender.
Don't show me this Help screen again.
When you click
Continue, the following error message may be displayed:
Security Warning
There are security problems with this message.
Please review the highlighted items listed below:
X Message has been tampered with
You do trust the signing digital ID
The digital ID has not expired
The sender and digital ID have the same e-mail address
The digital ID has not been revoked
There are no other problems with the digital ID
Don't ask me about this message again.
If you click
Open Message, you may or may not be able to read the e-mail message.
CAUSE
This problem can occur if the sender of the digitally signed e-mail message enabled the option to break apart e-mail messages larger than x kilobytes (KB) (where x is 60 KB by default).
RESOLUTION
To resolve this issue, do not break apart messages. If you are breaking apart large messages, follow these steps to disable that feature:
- On the Tools menu, click Accounts.
- On the Mail tab, click to select the e-mail account that you want, and then click Properties.
- On the Advanced tab, click to clear the Break apart messages larger than x KB check box, where x is a size that you can select.
STATUS
Microsoft has confirmed that this is a problem in the products listed at the beginning of this article.
Keywords: kbenv kberrmsg kbnofix kbprb KB202481