Yes, it actually contacts the server to make sure the address is valid and usable. http://drupal.org/project/email_verify To use it with comments (patch): http://drupal.org/node/458758 A tip to use with any form: http://drupal.org/node/898726   Nancy  Injustice anywhere is a threat to justice everywhere. -- Dr. Martin L. King, Jr.

________________________________ From: Shérab

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I'll mention one that probably no one else will: Email Verify.

Close enough to my own suggestion ! :-) But I didn't knowit was possible to verify e-mail validity beyond purely syntactic verification.

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It checks to see if they enter a validand reachableemail address. It has no visible component, so it may not even be on your radar, but I consider it indispensable in the war against spam.

It is for sure helpful !

Could you provide pointers ?

Hello Nancy,

Yes, it actually contacts the server to make sure the address is valid and usable.

Okay but if the link between the address and the submitter can't be established, then a spammer could provide any legitimate address, like yours for instance ! Thanks for the links however ! Sherab.

Combating spam is never going to be a single module solution. Email Verify is only one of them. And no matter how many you use, you will not be 100% effective. Spammers are very persistent.

Yes, yes. My point was just to say that it is perhaps not worth the effort to install the module, since it is so easy to circumvent it. Sherab.

Ms. Nancy Wichmann (2011/09/21 11:48 -0700):

Suit yourself. I find it pretty effective because most spammers just jam letters together. It also helps in real users not misspelling their email address.

I like your points, thanks! Anyway it's good to knowthis solution exists and you were right: noody except you mentionned it ! So, thanks again ! Sherab.

Hello Shérab, On 21/09/11 09:14 +0200, Shérab wrote:

I didn't have to set-up any spam protection on the drupal sites I amadministrating, so far. But as a user, what I find the mostconvenient is when sites send you a code or a link in an e-mailyou then have to re-send to the site to prove your request is legitimate.

I realise this is not an absolute protection, but perhaps this would be enough to discourage spammers: wouldthey really want to automate such a thing: fill a form, wait for an e-mail, extract the information from that mail and then re-submit to the site...

I'm administering a site and we registrations from spambots, although a veryfication by e-mail is mandatory. I don't know why they register, either.

The other point is that I don't know whether there are Drupal modules to do that.

You could allow things for registered users only and use the registration system, but that usually not what you want if you use captcha.

A satisfactory solution for me was the one used on project Euler's website. It was audible, didn't use any javascript, so I found it pretty cool and it is the only good experience I can think of regarding captchas.

Could you provide a link to that website? Have a nice day Rolf -- ... But, conscience asks the question, 'Is it right?' ...

Hello Shérab, On 21/09/11 09:47 +0200, Shérab wrote:

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I'm administering a site and we registrations from spambots, although a veryfication by e-mail is mandatory.

But is it a marginal phenomena,or do you get a lot of them ?

We use captcha on the registration form and I increase the complexity every time it happens, but it still happens around once a week. Not a lot, but it's a small site.

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Could you provide a link to that website?

http://www.projecteuler.net

Thank you, but I don't hear anything from the captcha used there. regards Rolf -- Cowardice asks the question, 'Is it safe?' Expediency asks the question, 'Is it politic?' Vanity asks the question, 'Is it popular?' But, conscience asks the question, 'Is it right?' And there comes a time when one must take a position that is neither safe, nor politic, nor popular but one must take it because one's conscience tells one that it is right. — Martin Luther King, Jr.