Contact Form 7 can manage multiple contact forms, plus you can customize the form and the mail contents flexibly with simple markup. The form supports Ajax-powered submitting, CAPTCHA, Akismet spam filtering and so on.
Documentation and Support
You can find docs, FAQ and more detailed information about Contact Form 7 on contactform7.com. If you were unable to find the answer to your question on the FAQ or in any of the documentation, you should check the support forum on WordPress.org. If you can’t locate any topics that pertain to your particular issue, post a new topic for it.
Contact Form 7 – Honey Pot
This simple addition to the wonderful Contact Form 7 plugin adds basic honeypot functionality to thwart spambots without the need for an ugly captcha.
While some spam is hand-delivered, the vast majority is submitted by bots scripted in a specific (wide-scope) way to submit spam to the largest number of form types. In this way they somewhat blindly fill in fields, irregardless of whether the field should be filled in or not. This is how a honeypot catches the bot, it introduces an additional field in the form that if filled out will cause the form not to validate.