Undeliverable message - System Administrator

[Guest]

I am receiveing an undeliverable message when I attempt to send mails to
certain addresses but not others. These are all e-mail addresses that I have
sent many mails to in the past. How can I fix this problem? Below is the
mail I am receiving:

Your message did not reach some or all of the intended recipients.

Subject: RE: hello
Sent: 4/5/2005 7:29 AM

The following recipient(s) could not be reached:

'Jane Doe' on 4/5/2005 7:29 AM
None of your e-mail accounts could send to this recipient.

 

[Guest]

Kas,

Take a look at this.

http://support.microsoft.com/?kbid=872896

Let me know if it works