As I have no answer, you could try 
Shortcircuit to bypass the blacklist, as onedrive.live.com is listed in phishing.bad.sites.conf
ifplugin Mail::SpamAssassin::Plugin::Shortcircuit
#
#   default: strongly-whitelisted mails are *really* whitelisted now, if the
#   shortcircuiting plugin is active, causing early exit to save CPU load.
#   Uncomment to turn this on
#
shortcircuit USER_IN_WHITELIST       on
shortcircuit USER_IN_DEF_WHITELIST   on
# shortcircuit USER_IN_ALL_SPAM_TO     on
# shortcircuit SUBJECT_IN_WHITELIST    on
#   the opposite; blacklisted mails can also save CPU
#
shortcircuit USER_IN_BLACKLIST       on
shortcircuit USER_IN_BLACKLIST_TO    on
# shortcircuit SUBJECT_IN_BLACKLIST    on
#   if you have taken the time to correctly specify your "trusted_networks",
#   this is another good way to save CPU
#
# shortcircuit ALL_TRUSTED             on
#   and a well-trained bayes DB can save running rules, too
#
shortcircuit BAYES_99                spam
# shortcircuit BAYES_00                ham
whitelist_from 
info@onedrive.live.com
whitelist_from 
info@play.google.com
blacklist_from 
info@spammers.be
endif # Mail::SpamAssassin::Plugin::Shortcircuit