Oracle Tips by Burleson
Chapter 13 - Spam, Spam,
Safely Peeking at Spam
The presence of HTML inside the body of the
message is a normally a dead give away that the message is spam.
Invocations of PHP Hypertext Protocol (PHP) or Active Server Pages
(ASP) content can also be clear indicators that the message is
spam. These can invoke malicious script to infect the computer.
The following section provides a closer look at
tools that can be used to avoid spam.
Tools to Avoid Spam
There are several ways to reduce the quantity
of spam messages received via e-mail. A good way to accomplish this
reduction is to install a filter program or to create personal spam
filter software. There are several types of spam filtering tools
PC-side spam filters. – These spam filters
accept updated spam definitions from the web and apply the rules to
incoming spam messages.
Server-side spam filters. – These spam filters
run off of the hosting server and stop spam before it hits the
inbox. Some of the more sophisticated tools rely on user-reported
spam and update the server definitions to quarantine them.
Approval-based spam. – Using this technique,
all messages are quarantined except those from individuals
identified by the user as friends. The spam bucket should be
reviewed periodically and approved e-mail addresses should be added
to the list of friends.
Manual spam filtering. – Tools such as
Microsoft Outlook express allow the manual definition of spam filter
conditions that can either quarantine or delete the messages.
The following section provides a favorite,
cheap and easy manual method of spam filtering. For example, up to
50% of the spam delivered to the inbox can be eliminated in just a
few minutes by quarantining messages with unusual characters, like
this e-mail subject line:
¡ÙÇöÀçÁÖ¹®¼âµµÁß! Å©¸®½º¸¶½ºÃò¸®Ç®¼¼Æ® °¡°ÝÀÌ
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