Spamassassin / Whitelist / Return-Path

I want to White List several email addresses that do not provide a Return-Path in their email header: marketwatchmail.com is one example. From what I understand, Return-Path, not From is necessary in the White Listing process.

DSPAM is currently off, so only Spamassassin is checking email.

Any suggestions?

Can you tell me ticket# if any that contain email headers for this email.
Please ensure it has both the bounce as well as the “original message before spamassassin”.

May I ask, what is the difference between dspam and spamassassin?

Spamassassin - http://spamassassin.apache.org/
dspam - http://dspam.nuclearelephant.com/

spamassassin is mostly a patter-based filter (it does have other capabilities too, but not used here), while dspam is a bayesian filter that works on learned data.