How to prevent spamming without using a recaptcha?

Hi All,

I have a contact-us form in my asp.net website and I want to prevent spamming without using a recaptcha. Is there any way or technique where I can prevent people from playing/spamming in my contact-us form?

Thanks,
RAM

re: How to prevent spamming without using a recaptcha?

Just some wild guesses from way outside the field...

Random questions like "What is 2 x3?"... Serving the same purpose by making the user have to read and respond with thought.

In some way have the contact-us page be generated at a new URL every time someone clicks "contact-us".. that way a bot can't latch onto one address?

Can most spam-bots handle drop-down selections? If readers have to select criteria for contacting from drop downs it is easier for them and might block bots. ???? "Department : Sales, shipping, payroll", "Reason: New customer, lost order, feedback"

re: How to prevent spamming without using a recaptcha?

Hi tlhintoq,

Yup my contact us form is in a different url, as well as my thank you page for the contact us form.

Here is how my contact us form works.
A user will input his/her name, his/her email address, and his/her message for us.
In my form, I also have a dropdown that contains a subject. Because the users must choose a subject depending on the concern that they want to raise. Each of the subjects will be sent to a corresponding recipient in my site. I am just worried that a user may fill-up my form, and click back then send over and over.

I am wondering if there mite be a script or something for this case. =)

Thanks for the quick answer. I appreciate it much.

Thanks,
RAM