question

Does the message appear in the display of the fax machine itself?

It appears on the Transmission Verification Report.

That's what I thought.  Ran across this before.  How I diagnosed it was to send a test fax to a known "good" fax machine, from my machine.  That way I knew the connection was OK.  In one case, the fax machine settings had to be changed (I found them in the manual for the machine).  However, I did have one fax that wouldn't go through for one of our customers.  Even though I was able to send a fax successfully to hundreds of other customers. So many times the fax is dependent upon the receiving end.  See if that helps.

Thanks. I'll check it out.