For anyone who runs a mailing list and has gotten pummeled recently with a rash of subscription attempts, they may be coming from mailbait.info.
A while ago I blogged on how to block mailbait, but it appears they have changed their host.
Their new host is ‘themailbait.bitbucket.org’.
I suggest you update your web server configuration to block any referrer that references the word ‘mailbait’ in the URL.
Here’s my new httpd.conf entry to block mailbait…
SetEnvIf Referer mailbait mailbait Deny from env=mailbait