[TYPO3] general advice on spam protection for forms

[Tim Loenders]

Hello,

Does anyone maybe know of a good way to protect forms from spam messages. I
tried adding the jb_fespam plugin, but I am afraid that doesn't work. Spam
keeps flowing in through mailing list, contact form and guestbook.

Is there maybe a plug in which allows to add those pictures that ask the
user to type some text whan they enter a reply.

Thanks for any advice!

Tim