I’ve finally learned how to get Thunderbird to ban a whole site: highlight a piece of spam in the inbox, go to “message/create filter from message”, choose not ‘is’, but ‘contains’, and get rid of everything but the part after the @.

Unfortunately if your e-mail is being hosted by a site that has sent me spam, you may find I am not getting your e-mails. Thus far I am not getting it from ordinary sites: these guys are mostly evident by sitenames containing ‘click’ and whatnot. Right now I am getting about 800 spams a day, and have just signed up with Spamcop. This should help. I’ll at least be getting the satisfaction of reporting these people to someone who can cause them trouble.