Unformatted text preview: h represents 25% of global email traffic and data
from over 100,000 ISP's, universities, and corporations.
On 2006-08-15 AOL announced the intention of digging up the
garden of the parents of spammer Davis Wolfgang Hawke in search
of buried gold and platinum. AOL had been awarded a US$ 12.8
million judgment in May of 2005 against Hawke, who had gone into
hiding. The permission for the search was granted by a judge after
AOL proved that the spammer had bought large amounts of gold
2008- McColo a San Jose based hosting provider found to host 75%
2008of worldwide spam. Shutdown, sharp decline in spam (for a while)
of SMPT Open Relays and SPAM
SMTP was designed to automatically relay any
message not intended for local delivery.
message Spammers (those who intentionally send mass
junk email) bounce messages off of SMTP
servers and send millions of junk email
messages through other’s mail servers
messages Open Relay: An
An SMTP server that processes mail where neither
the sender or receiver is a local user.
SMTP can be configured to only relay mail that
meets certain requirements
meets SMTP can now require authenticated access to
relay. Spam bots
It is estimated that 80% of all spam is sent
via compromised computers running spam
agents. These bots are created via spam viruses Spammers need a lot of email accounts auto creation of mailboxes cat and mouse game SPAM Blocking Software
(Server Blocks SPAM on server before client ever sees messages
Easy to enforce corporate SPAM policies
Blacklist Blocks all email from known Spammers Open Relay Database (ORBD) www.ordb.org
www.ordb.org Draconian approach to Open Relay Spammers SBL (Spam Black List) www.spamhaus.org
www.spamhaus.org XBL (Exploits Black List) www.spamhaus.org
www.spamhaus.org Database of IP addresses being exploited for SPAM PBL (Policy Black List) www.spamhaus.org
www.spamhaus.org Database of IP addresses blocked by ISP policy
Whitelist Only allows mail from accepted domains Greylist Lists based on behavior of server not email content.
Temporarily delay messages from server with 4xx error code
Temporarily SPAM Blocking Software
Blocks SPAM on client after mail is
Messages take more space and
bandwidth Questions for Thought
What should we do about SPAM ?
Legal Solutions ?
Technical Solutions ?...
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- Fall '12
- E-mail, Mail, SMTP, open relay