[Mailman-Developers] Remediation for fake member creation

[Franck Martin]

I'm not sure if you have seen the following blog posts: 

https://wordtothewise.com/2016/08/subscription-bombing-esps-spamhaus/ 
https://wordtothewise.com/2016/08/spamhaus-comments-on-subscription-attack/ 
https://wordtothewise.com/2016/08/ongoing-subscription-attack/ 

While mailman does double opt-in, one can still fill a mailbox with account confirmations, what are the methods to stop a bot submitting email addresses for registration across several lists?