How can I be sure the bbpress register form not spammed?
I have a Register form using the BBPress plugin and I added a custom field to identify which country the user is from as well as the SI Captcha add on.
I receive registrations from around the world and when I try to send emails to registrants some come back as cannot be delivered.
So my question is how can I be sure the registration page cannot be used by spammers? Are there any settings I can activate apart from Akismet which does not seem to touch the Registration page and only Blogs.