It is usually bulk email sent from advertisers to entice you to buy a product or service, similar to the junk mail delivered by the postman. Most spam can not be traced or replied to. It will immediately reduce the amount of unwanted email in your Inbox. Spam is at the very least annoying, and in some cases may lock up your email or even worse deliver a harmful computer virus. A lot of spam may also prevent your wanted email from loading properly.
Spammers target their victims by collecting random email addresses from several sources.
Likely sources are from email you sent to unknown sources, email you received from others as part of a group or list, and from forward emails that did not have your email address removed first. Other sources are from completing on-line forms and registering for FREE stuff on the internet, including daily joke and picture email lists. Basically, anytime you give out your email address you are increasing the risk of receiving more spam. There is always the chance that an email from a known source and properly addressed to you can be deleted. If the filter has deleted one or more emails that you were expecting, we can attempt to retrieve it for you, but we can not guarantee we can retrieve it for you.