I would like to give unregistered visitors the chance to send emails to node authors through a contact form. What would be the best and most efficient way to filter out spam?

1) Simply add a CAPTCHA to the contact form. However, I experienced CAPTCHA module to be not very reliable and I won't be able to afford Mollom.

2) Involve an external Gmail account and make use of their sophisticated spam filters. For example, when user A submits a contact form on a node created by user B, the email is first sent to an external Gmail account, filtered, and then - if spam free - forwarded to user B.

1 Answer 1


As an alternative for Mollom, perhaps Akismet could work? The service runs analysis on the comments/posts and determines whether they are spam from their content.

As an alternative for Captcha, perhaps Are You A Human could work? Rather than using wobbly text it asks you to complete a very simple game - causing less frustration to your users.

To properly answer your question: Given the two alternatives, I think the most efficient way to filter spam would be through Gmail, although it might violate their EULA.

  • Thank you, I will have a look at Akismet and compare with Mollom. Alternatively, do you have any suggestions how to improve the efficiency of Captcha module, e.g. by combining it with other modules?
    – deinqwertz
    Apr 9, 2013 at 10:14
  • Afraid not, I haven't had an opportunity to try the Captcha module.
    – Sleavely
    Apr 12, 2013 at 8:15

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