POSTGREY or POLICYD-WEIGHT

[nuno]

Hi folks

i have a question, i have many problems with emails the clients says don't recive importants emails and all email in hotmail go to spam folder (i know this can be relative), so the question is for you (gurus):

can i desable POSTGREY or POLICYD-WEIGHT for this situation, what is you advice?

Thank you

P.S i doing a re-search in forum but are many diferents option, so i ask this for the real gurus

Reverse DNS are good
aol.com
yahoo.com
gmail.com
are good to just to inform!

Nuno