Can't figure out why this is bouncing

I don't know why, but recently DCC has started bouncing mail to the admin 
address of a locally-hosted mailing list (line breaks added for 
readability):

h7E0RiJ8019021 - - - - - - -
 Aug 13 20:27:48 yetta sendmail[19021]: h7E0RiJ8019021: from=<>, 
 size=3453, class=0, nrcpts=1, 
 msgid=<200308140027.h7E0RiJ8019021@yetta.net>, proto=SMTP, daemon=MTA, 
 relay=ghanima.speedsite.com [206.126.224.5]

 Aug 13 20:27:48 yetta sendmail[19021]: h7E0RiJ8019021: Milter: data, 
 reject=550 5.7.1 5.7.1. 550 Suspected spam; mail refused.  See 
 http://yetta.net/rejected_mail.html#dcc

 Aug 13 20:27:48 yetta sendmail[19021]: h7E0RiJ8019021: 
 to=<b5-atlanta-chat-admin@yetta.net>, delay=00:00:01, pri=30203, 
 stat=5.7.1. 550 Suspected spam; mail refused.  See 
 http://yetta.net/rejected_mail.html#dcc


In the /var/dcc/whitelist file I have

ok	to	b5-atlanta-chat-admin@yetta.net

I also have mail to that address classified as "spamfriend" in the 
sendmail access file.

But mail to that address is still bouncing.  I'm quite puzzled.  Help?

-Bertha
-- 
(After losing a hockey ball from the roof)
Dante: Are there any balls down there?
  Jay: About the biggest pair you ever seen, dingleberry!