Many Internet Service Providers and manufacturers offer filtering software to limit the spam in their users' email inboxes. In addition, some old-fashioned ‘filter tips' can help you save time and money by avoiding frauds pitched in email. OnGuard Online wants computer users to screen spam for scams, send unwanted spam on to the appropriate enforcement authorities, and then hit delete. Here's how to spot 10 common spam scams:1 to 4 of 4