Often a web site has a contact us form.  Simple enter your name, email address and comment.  After a few months on the Internet the are getting dozens of spams to their email address.  While there are a bunch of spam reducing methods if you have the ability to create email forwards you can use this to reduce the amount of drive by email harvesting spammers. Read More Below...

Many form to email solutions allow a web developer to easily change the target address simply by modifying a ‘hidden’ field. Unfortunately spammers can use this information to add an address to their spamming lists or worse reproduce the form locally and slam that address with emails.

To get around this in addition to often using a captcha I also have the emails sent to a dummy email address and then forwarded. So instead having the form send to myaddress@example.com I have it send to formresult123@example.com which I then forward to myaddress@example.com.   If in a few weeks if I’m getting spam at that email address I simply switch it to a new random one like formresultwer@example.com.

This trick works ONLY if you don’t have a catch all email address AND you can setup a forwarding email address which most hosting providers allow you to do this.  For more information on setting up an email forwarder check your hosting providers help or FAQ.