10 Facts About E-mail spam

Since the expense of the E-mail spam is borne mostly by the recipient, it is effectively postage due advertising.

When E-mail spam is sent by otherwise reputable companies it is sometimes referred to as Mainsleaze.

Image E-mail spam, or image-based E-mail spam, is an obfuscation method by which text of the message is stored as a GIF or JPEG image and displayed in the email.

Image E-mail spam was reportedly used in the mid-2000s to advertise "pump and dump" stocks.

In June 2006, an estimated 80 percent of email E-mail spam was sent by zombie PCs, an increase of 30 percent from the prior year.

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Total volume of email E-mail spam has been consistently growing, but in 2011 the trend seemed to reverse.

In terms of volume of E-mail spam: According to Sophos, the major sources of E-mail spam in the fourth quarter of 2008 were:.

Outbound E-mail spam protection combines many of the techniques to scan messages exiting out of a service provider's network, identify E-mail spam, and taking action such as blocking the message or shutting off the source of the message.

Since E-mail spam is, by definition, unsolicited, this address harvesting is done without the consent of the address owners.

Spam-support services can include processing orders for goods advertised in E-mail spam, hosting Web sites or DNS records referenced in E-mail spam messages, or a number of specific services as follows:.