Invalid Recepients

[sim]

I try to send an email and it will return an error message
from the administrator saying -Your message "Subject"
could not be delivered to the follwing invalid recepients.
I try to check and the email address that I want to send
this message is well working. What is the possible reason
why this message comes out.

 

[Roady]

There must be more in the error than this. Without this info there could be
millions of reasons. Also state your version of Outlook and the way you are
connected (Exchange, POP3, IMAP, HTTP)