How to view contents of POST requests?

Solution 1:

These are known subscribe bots, they subscribe a pile of innocent users to hundreds of lists. I literally have over 10K ips I've collected and blocked over the past year. A couple things you can do is block based on client string or upgrade your mailman install to a newer version that forces formdata to originate from the subscription page and not directly access the formaction. Also I advocate looking up the abuse email from the network they are coming from and emailing a complaint with some log excerpts. So far it hasn't done me any good but most of these attacks are coming from hosting facilities, I even had a few from Amazon. If enough people complain maybe these hosting providers will shut down this activity.