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1 Answer

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I'll tell you what I do. This wouldn't work for a high volume of users signing up. It works for me as my site gets about 1 new user every 2, 3, 4 days or so.

1. Get the Stop Spam plugin https://www.q2apro.com/plugins/stop-spam and set a question

2. Go to the Users tab in the admin panel

3. Tick Custom message in email sent to new registered users:

4. Put this message inside:

"Please email me to get approved. youremailaddress@yourdomain.com This is only required to verify you are a real person. Please include your Username (see below). I will respond to your email within (time period of your choice)."

5. Go to the Spam tab in the admin panel

6. Tick or un-tick as follows:

Un-tick Request confirmation of user emails:    
Tick Enable moderation (approval) of users:
Tick All new users must be approved:    
Tick Email me when a new user registers:

7. Go to the Permissions tab in the admin panel

8. Set the following to Approved users only

Asking questions:    
Answering questions:    
Adding comments:    
Voting on questions:    
Voting on answers:

That's it. I get zero spam posts out of about 8000 posts per month on my site.

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Good operation method.
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Thank you Sama55.
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Or another solution would be to remove entirely the q2a email registration and allow users to register using only their social accounts (Facebook, twitter, google+ etc). I tried it and it works but it needs some core hacks and mods ;)

Just an idea ;)
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A significant amount of my users do not have Facebook accounts and the like for privacy reasons mainly.
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