Why is this hostname failing?

[John Baker]

Hi,

I user reported mail not getting to him from somebody and I found this 
in the log:

 NOQUEUE: reject: RCPT from bmmail.cwf.org[216.54.2.34]: 504 
<doorway3>: Helo command rejected: need fully-qualified hostname; 
from=<[EMAIL PROTECTED]> to=<[EMAIL PROTECTED]> proto=SMTP 
helo=<doorway3>

bmmail.cwf.org returns a valid result from a dns check. What am I 
missing here?
--
John Baker
Network Systems Administrator
Marlboro College
Phone: 451-7551 off campus; 551 on campus