Web site vulnerability?

I have a web site that I created that allow perspective clients to submit a form which is emailed to our company. Over the past few days I have received some odd responses, well actually the same one.

Does anyone have any idea what is causing this?

here is an example of the email ouput:


"What is your approximate price range? :
Province/State: Bush
Address:
http://google.com
City: Phoenix
Email: main@yandex.com
Country:
USA
Telephone: 55555
Comments: Hello, nice site look this:
<a href="http://aktokuhc-2.info/00380.html">link</a>
[url=http://aktokuhc-2.info/00380.html]link[/url]
http://aktokuhc-2.info/00380.html
<a
href="http://aktokuhc-2.info/00008.html">link</a>
[url=http://aktokuhc-2.info/00008.html]link[/url]
http://aktokuhc-2.info/00008.html
<a
href="http://aktokuhc-2.info/00118.html">link</a>
[url=http://aktokuhc-2.info/00118.html]link[/url]
http://aktokuhc-2.info/00118.html
<a
href="http://aktokuhc-1.info/00405.html">link</a>
[url=http://aktokuhc-1.info/00405.html]link[/url]
http://aktokuhc-1.info/00405.html
<a
href="http://aktokuhc-2.info/00128.html">link</a>
[url=http://aktokuhc-2.info/00128.html]link[/url]
http://aktokuhc-2.info/00128.html
<a
href="http://aktokuhc-2.info/00214.html">link</a>
[url=http://aktokuhc-2.info/00214.html]link[/url]
http://aktokuhc-2.info/00214.html
<a
href="http://aktokuhc-1.info/00294.html">link</a>
[url=http://aktokuhc-1.info/00294.html]link[/url]
http://aktokuhc-1.info/00294.html
<a
href="http://aktokuhc-1.info/00033.html">link</a>
[url=http://aktokuhc-1.info/00033.html]link[/url]
http://aktokuhc-1.info/00033.html
<a
href="http://aktokuhc-2.info/00379.html">link</a>
[url=http://aktokuhc-2.info/00379.html]link[/url]
http://aktokuhc-2.info/00379.html
<a
href="http://aktokuhc-1.info/00053.html">link</a>
[url=http://aktokuhc-1.info/00053.html]link[/url]
http://aktokuhc-1.info/00053.html
<a
href="http://aktokuhc-2.info/00092.html">link</a>
[url=http://aktokuhc-2.info/00092.html]link[/url]
http://aktokuhc-2.info/00092.html
<a
href="http://aktokuhc-1.info/00211.html">link</a>
[url=http://aktokuhc-1.info/00211.html]link[/url]
http://aktokuhc-1.info/00211.html
<a
href="http://aktokuhc-2.info/00026.html">link</a>
[url=http://aktokuhc-2.info/00026.html]link[/url]
http://aktokuhc-2.info/00026.html
<a
href="http://aktokuhc-1.info/00482.html">link</a>
[url=http://aktokuhc-1.info/00482.html]link[/url]
http://aktokuhc-1.info/00482.html
<a
href="http://aktokuhc-2.info/00478.html">link</a>
[url=http://aktokuhc-2.info/00478.html]link[/url]
http://aktokuhc-2.info/00478.html
<a
href="http://aktokuhc-1.info/00331.html">link</a>
[url=http://aktokuhc-1.info/00331.html]link[/url]
http://aktokuhc-1.info/00331.html
<a
href="http://aktokuhc-1.info/00323.html">link</a>
[url=http://aktokuhc-1.info/00323.html]link[/url]
http://aktokuhc-1.info/00323.html
<a
href="http://aktokuhc-2.info/00285.html">link</a>
[url=http://aktokuhc-2.info/00285.html]link[/url]
http://aktokuhc-2.info/00285.html
<a
href="http://aktokuhc-1.info/00208.html">link</a>
[url=http://aktokuhc-1.info/00208.html]link[/url]
http://aktokuhc-1.info/00208.html
<a
href="http://aktokuhc-1.info/00398.html">link</a>
[url=http://aktokuhc-1.info/00398.html]link[/url]
http://aktokuhc-1.info/00398.html
<a
href="http://aktokuhc-2.info/00442.html">link</a>
[url=http://aktokuhc-2.info/00442.html]link[/url]
http://aktokuhc-2.info/00442.html
<a
href="http://aktokuhc-1.info/00027.html">link</a>
[url=http://aktokuhc-1.info/00027.html]link[/url]
http://aktokuhc-1.info/00027.html
<a
href="http://aktokuhc-2.info/00112.html">link</a>
[url=http://aktokuhc-2.info/00112.html]link[/url]
http://aktokuhc-2.info/00112.html
<a
href="http://aktokuhc-2.info/00125.html">link</a>
[url=http://aktokuhc-2.info/00125.html]link[/url]
http://aktokuhc-2.info/00125.html
<a
href="http://aktokuhc-1.info/00434.html">link</a>
[url=http://aktokuhc-1.info/00434.html]link[/url]
http://aktokuhc-1.info/00434.html

End ^) See you"

If anyone culd shed a bit of light on this then I can work on trying to eliminate it.

Thanks,

COB
clcuserAsked:
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PhilHowCommented:
The is produced by a spambot(a program that simulates form submission.  The links are to porn sites, gaming sites or malicious software sites.

To prevent this kind of spam you need to validate the submittr as human. To do that you would use something like CAPTCHA (see wikipedia) or Google it.

You will never completely stop spam as long as you have submission forms.  Of more concern is whether you are validating the input to prevent code injection exploits.  If you are just accepting whatever is entered without sanitizing and validating you are opwen to serious hacker attacks and you need to address security before you get hammered.
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clcuserAuthor Commented:
appreciate your time. thanks!!!
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