The term spam refers to submitting the same message to a large group of individuals in an effort to force the message onto people who would otherwise choose not to receive this message. According to estimates, 80% of eMails sent everyday are spams!!

To stay away from spams install Spamavert.com 1.2 firefox add-on.

What Spamavert.com 1.2 Does ?
It generates temporary e-mail addresses for all those pesky online registration forms using the free spamavert.com service.And its Highly customizable.

How It Works ?
Allows you to right-click any text field on any website, and paste a free, one-time e-mail address from Spamavert.com. These disposable addresses comes in handy when registering on websites you don’t trust.

The extension also opens the Spamavert.com mailbox and waits for new e-mail for the address it generated for you.

The plugin also remembers the addresses it has generated, and automatically subscribes to their RSS feeds. You can at any time go back and view the e-mails for that address, and see if the company abused the e-mail address you gave them.

You can also specify a prefix for all the e-mail addresses the extension generates for you.

Link: Spamavert 1.2 Firefox Extension