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? _______________________________________________ Mailman-Developers mailing list Mailman-Developers@python.org https://mail.python.org/mailman/listinfo/mailman-developers Mailman FAQ: http://wiki.list.org/x/AgA3 Searchable Archives: http://www.mail-archive.com/mailman-developers%40python.org/ Unsubscribe: https://mail.python.org/mailman/options/mailman-developers/archive%40jab.org Security Policy: http://wiki.list.org/x/QIA9