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Legitimate emails are getting lost

There are several ways in which legitimate emails can get lost, and as a result never reach their destination.

The most trivial is when using a wrong email address. While this may be very annoying, it is still in the hands of the sender and he can make sure there is no mistake there.

But what about those areas outside of the sender's control?

Recent studies show two such critical points in which emails get lost:

The recipient's Internet Service Provider (ISP) failing to deliver the emails

Usually for two reasons:

Legitimate emails accidentally filtered as spam and thereafter deleted.

	"Some researchers say up to 17% of legitimate messages are blocked by spam filters used by ISPs."
	Hallie Potocki. (May 5, 2004) Swimming in SPAM Richmond Times-Dispatch [Online]. Available: http://www.timesdispatch.com

Legitimate emails rejected due to overloaded servers (usually the result of spam/virus/other attacks on the network).

	"A recent study by Assurance Systems indicates that approximately 12% of all e-mail messages sent to valid e-mail addresses at the top nine ISPs and webmail providers did not end up in the inbox as intended."
	An Assurance Systems Brief: Avoid the Spam Filter Trap. [Online] Return Path, Inc. Available: http://www.returnpath.biz/download/download.php (October, 2002)

In both cases the person to whom the mail was sent as well as the sender are totally unaware that the mail was deleted or otherwise mistreated.

The recipient's anti-spam software - accidentally filtering legitimate emails as spam

A recent study by PC MAGAZINE (February 17, 2004) reveals:

On average, 14% of all legitimate emails are blocked by popular antispam tools.

(February 17, 2004). PC Magazine

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