Secure my site - being used to send spam

Job ID: 33504780

Budget: £10 – £30 GBP

Hi,

It seems my domain is being used to send spam. My site uses Joomla and virtuemart. I have spoken to my host and they said :-

"It seems that the e-mails are being sent using a script in your index.php file from your public_html directory"

", we are guessing that you have a signup form somewhere on your website that is unprotected and therefore being used to send spam towards different e-mail addresses"

"Please make sure to implement a captcha form to any contact/signup form you may have on your website. You may use Google reCAPTCHA, as an example: https://www.google.com/recaptcha/about/"

We need someone who can stop whatever is being used to send SPAM.
Related categories: PHP Web Security Joomla Virtuemart