Outlook E-Mail Un-Delivrable ?

[BankableDB]

I have sent several messages to a client at BigFoot.com
They come back not deliverable with message:
"The Pipe has been ended."
What in the world does this mean?
Even if I reply to a received message I get this response.
Help Plz?
ThankZ!

 

[JillC]

You haven't said which email program you are using. I think the most likely cause is that you have an incorrect email address in your address book which is being used instead of the correct email in the reply-to section. Delete any references to this person or address in your address book and then try replying.

Jill.