spam weesan lee weesan@cs.ucr.eduweesan@cs.ucr.edu

SPAM

WeeSan Lee weesan@cs.ucr.edu

Roadmap

What is SPAM? Why Spamming? How to avoid SPAM? References

What is SPAM?

Spiced ham or luncheon meat?

http://media.hormel.com/images/refimages/museum%20press%20kit/spam%20hero%20web%20ready.jpgUnso

licited Emails.

Why Spamming?

Cheap Senders cost almost nothing

Effective 0.001% of 1 million = 10 respondents

A very tough battle for end users!

How to avoid SPAM?

Use a SPAM blocker or anti-spam software Spam tagging

Unsolicited Commercial Email (UCE) X-Junkmail: UCE

SpamAssassin X-Spam-Flag: YES

SMTP Authentication Need to provide username and password before

sending emails Stop publishing your email address online

How to reduce false positive?

False positive Good emails get classified as SPAM

UCR webmail Set UCE score a little higher (HW4)

Other webmails Add known addresses to address book

References

Internet Effectively Ch 1 Ch 4

The Apache SpamAssassin Project http://spamassassin.apache.org/

UCR SMTP Authentication http://www.cnc.ucr.edu/antispam/index2.php?content=auth

entication/index.html UCR Anti-Spam

http://www.cnc.ucr.edu/antispam/