[TMIC] what's this?

[[EMAIL PROTECTED]]

The reason I was testing was because I recently sent a message - I thought - to 
the tmic list, and got this reply!  Where did this come from?  I'm not familiar 
with it.  Does anybody know?
This is what the message said:
We are unable to deliver the message from <[EMAIL PROTECTED]>
to <[EMAIL PROTECTED]>.
Sally