Lots of talk about the "anonymous" APEWS blacklist lately. Over on DNSBL Resource, I summarize everything I've seen on the topic, and include some info regarding its effectiveness as an anti-spam filter against my own spamtrap and hamtrap.
Additionally, I've added a page with tips on what to do if you find yourself blacklisted by APEWS.
ReturnPath on DMARC+Yahoo
10 hours ago