Many spammers operate "bots": autonomous software robots that "crawl" the Web looking for email addresses. If you post your email address publicly anywhere online (on a website, a discussion forum, on USENET, in a guestbook etc.) then sooner or later it will be found by one of these bots and will then get added to a spam mailing list. These harvested email addresses are commonly bundled by the millions onto CDs, which spammers then use to send out their unwanted messages._________________________________________________________________-
Don't post your email address in "plain" form anywhere on the Web. Instead, you can disguise your email address by writing it in a convoluted way so that humans can still read it, but bots can't. For example, instead of writing "john@example.com", use "john AT example DOT com".
Keep a "private" email address which you share only with close friends and family. Never use this private email address on any site. Jmail by Spamjadoo.com is recommend and provides you privacy. Obfuscate your email address before posting it on your website by using the email address encoding tool. Use a feedback form on your website instead of providing a contact email address.
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Choose a relatively long email address (8+ characters)
Never sign up for an email address which is the same as your first name or last name (e.g. ajay@hotmail.com). Instead, add your initials and some numbers (e.g. ajay77@hotmail.com)