Spam-Free Mailto Link
By now, we've all learnt that simply putting a link to your e-mail address on a website means exposing yourself to spammers. Bad idea! For this reason, contact forms with captcha are often used instead. But sometimes we do want to display an e-mail address.
What to do?
Well, security through obscurity may not be 100% reliable but still helps. Some people take it too easy and write something like: smartypants AT yahoo dot com. First of all, it is not user-friendly. It is not a link you can click and send e-mail from. Do you expect your users to be deciphering it? Secondly, I am sure most spam bot algorithms can decipher it by now quicker than humans.
So, here is a little more sophisticated obsfuscation which renders proper link and has been working quite well for me, so far: