@@@@@@@@@@@@RRRRRGH!

It won't for long if you keep publishing your full email address on the internet!

Email harvesters are the most unwanted visitors on any website especially ours. These email spambots crawl the web via search engines to find and extract email addresses from webpages and blogs. Chat rooms are virtual magnets for email harvesting software. Email harvesters also scan public areas of the web like internet newsgroups, listserv and forums, blog comments area, "Contact Us" webpages, mailing list archives and guest books.

How email spammers operate?
Email addresses always contain an @ symbol. Most spambots do a pattern-search for likely combinations of letters (abc@xyz.com) like billgates@microsoft.com or larrypage@google.org in the HTML source of webpages. Often they just search for the @ character and grab all the letters on each side on the assumption that it's a valid email address.

That being so, simply remove the '@' and type 'at' if you must, and type 'dot' instead of '.'

(from Labnol)