11 Facts About Email spam

Email spam, referred to as junk email, spam mail, or simply spam, is unsolicited messages sent in bulk by email .

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

When Email spam is sent by otherwise reputable companies it is sometimes referred to as Mainsleaze.

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

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

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

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

Some popular methods for filtering and refusing spam include email filtering based on the content of the email, DNS-based blackhole lists, greylisting, spamtraps, enforcing technical requirements of email, checksumming systems to detect bulk email, and by putting some sort of cost on the sender via a proof-of-work system or a micropayment.

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

Since Email 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 Email spam, hosting Web sites or DNS records referenced in Email spam messages, or a number of specific services as follows:.