You should never post your real email address to a forum, comments form or other webpage that's publicly accessible.  If you do it will almost be certainly be harvested by spammers.

Some people try to get around this by "munging" their email address, that is, disguising the address so that only a human can understand it.  A typical example of munging is bill(at)microsoft(dot)com.

However you can make it nearly impossible for OCR by using different fonts and colors like this:

Converting you email to a graphic can be done easily and for free at several websites.  One of the most impressive is http://www.hidetext.net.

It an impressive free service.  The only downside is that not all email services are catered for. Still, even if your email provider is not included you can still convert your address to plain text without the fancy fonts.