[Mailman-Developers] Remediation for fake member creation

[Franck Martin]

----- Original Message -----
> From: "Barry Warsaw" <barry at list.org>
> To: "mailman-developers" <mailman-developers at python.org>
> Sent: Monday, August 22, 2016 2:43:06 PM
> Subject: Re: [Mailman-Developers] Remediation for fake member creation

> On Aug 22, 2016, at 01:03 PM, Franck Martin wrote:
> 
>>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 3 will not pend a registration request more than once for an
> email/mailing list combination.  It's possible to spam every list at least
> once though, and I'm not sure what you could do about that.

May be a captcha? Or some more modern techniques...