1 Jun
2017
1 Jun
'17
4:27 p.m.
Brian Kantor said:
Mailman doesn't have CAPTCHA.
Here's a patch for adding reCaptcha support to Mailman:
https://www.dragonsreach.it/2014/05/03/adding-recaptcha-support-to-mailman/
It does use a challenge; when you request to subscribe,
it mails you a
key that you have to mail back, but I know that bot subscribers have
already automated that. It helps keep some undeliverable addresses from
subscribing, but it's not designed as a real security measure.
My standard practice (on all Mailman instances I admin) to prevent
"drive-by spamming" is configuring lists so that new subscribers are
moderated and checking their initial submissions. It does require a bit
of the moderator's time, but Mailman's WebUI makes the process quite
easy.
Moderation is a good tool for weedinf out problem subscribers. Use the
control at the bottom off /mailman/admin/<list-name>/members to turn
on/off everyone's moderation bit.
73,
--
Steve K0STK // k0stk(a)arrl.net