PDS_NO_HELO_DNS is not helpful at all.

[Mark London]

I'm sorry for not using bugzilla, but the new rule for PDS_NO_HELO_DNS 
is mostly hittng real emails at my site 1168 real emails versus 219 spam 
mls.   Luckily, the score is not high, to be making any difference.   
FWIW. - Mark