Stop registration being hacked

Hi,

Joomla registration cannot be "hacked" as far as I know.
I suppose that you're talking about bots creating fake accounts on your website.
There are three main ways:
- add a captcha to the registration form. That way, the user registering has to validate the captcha to register. However, some bots can also validate captchas, so while it can help, it's not a perfect solution. It might do nothing for you based on how the bots targeting your website are coded.
We do provide a free Recaptcha plugin that can be installed for that here:
www.hikashop.com/support/documentation/7...-with-recaptcha.html
- This extension www.joomlashack.com/joomla-extensions/ospam-a-not/ is a bit like a captcha solution but without the user having to do anything. And most bots will probably be fooled by it. But it's possible that it can also block normal users when they do some strange operations on their browser (because they don't know what they are doing, and refresh too much the page, or resubmit the form too quickly etc).
- the other solution is to check the information provided by the user in the registration form against a database of known bots. This is a very effective solution. However, it requires someone managing that database. Such a database, that is used by a lot of websites to check the information of all their new users can require many big servers, and the database needs to be cured, maintained, etc. So such a solution is usually proposed as a service, and thus not free. You can find many such extensions here: extensions.joomla.org/tags/spam-protection/

Hi,

What do you mean by "get hacked emails" ?
Emails can't be "hacked". Do you mean "notification emails of user account created with invalid email addresses" ?
While a captcha can help for that, I already told you that it might not help at all:

However, some bots can also validate captchas, so while it can help, it's not a perfect solution. It might do nothing for you based on how the bots targeting your website are coded.

- This extension www.joomlashack.com/joomla-extensions/ospam-a-not/ is a bit like a captcha solution but without the user having to do anything. And most bots will probably be fooled by it. But it's possible that it can also block normal users when they do some strange operations on their browser (because they don't know what they are doing, and refresh too much the page, or resubmit the form too quickly etc).
- the other solution is to check the information provided by the user in the registration form against a database of known bots. This is a very effective solution. However, it requires someone managing that database. Such a database, that is used by a lot of websites to check the information of all their new users can require many big servers, and the database needs to be cured, maintained, etc. So such a solution is usually proposed as a service, and thus not free. You can find many such extensions here: extensions.joomla.org/tags/spam-protection/