These two modules help:

https://drupal.org/project/botcha
https://drupal.org/project/honeypot

Nothing will stop it 100% though. Some spammers actually pay humans to sit there and register accounts. Basically if you block them, you'll block everyone else from registering.
Jamie Holly
http://hollyit.net
On 2/4/2014 2:22 PM, john boris wrote:
I am working on a new site (Drupal 7) and I have reCaptcha module installed which includes the image captcha as well. This still isn't keeping out the gnats trying to get logins. I have the site set that all new users need to verified with a valid email and the admin needs to authorize the new user but it still hasn't stopped them. I am looking for other ideas where I can limit these issues. I am getting about 15 a day and they seem to be growing. 
I have a few mandatory fields setup but I don't want to make it totally a pain for new users to put in the valid info.

This might be just a cost of having the thing open for new users but if anyone can give me some other ideas on how to stem the tide I would appreciate it.

Thanks in advance.

--
John J. Boris, Sr.
Online Services
www.onlinesvc.com