Jake of the Web

http://www.guerrillamail.com/

http://www.temporaryinbox.com/

http://www.pookmail.com/

Much like what numbr.com & privatephone.com do for phone numbers, these sites will create a temporary email address. Guerrillamail, for example, lasts only 15 minutes, but will tell you if you receive any emails at that address during that time. These sites are intended as a tool against spam caused by obligatory registration when buying online or registering for some free web sites. Now you don't even need to have the 'spam email account', you can simply create a new temporary email address when needed, and then walk away.