AOL Spam Filtering Technology by lurklot

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									America Online (AOL) is one of the major mail administrators in the internet industry. AOL like other mail
administrators provides a quality service in terms of its mailing procedures and formats. Optimizations of
emails as well as spam filtering are also part of AOL's service. Indeed AOL makes a clear runway for their
users emails.


Sender Policy Framework (SPF) has been adopted by AOL to fight spam. SPF doesn't literally block spam
unlike spam filters and spam busters. What an SPF does is that, it keeps the real addresses from being
forged, and thus prevent misdirected emails (bounced emails) on legitimate senders - protected return path.
Spammers forge addresses to hide their true identity and as well prevent bounced emails from their inboxes.
Through SPF user can know if the sender's address is authentic or fake.


Furthermore, SPF let the users specify their sending policy. Whenever a policy is made by a user, the
domain owner publishes this policy. And when someone's mail sever receives a message suggesting to came
from that domain, that recipient sever can check if indeed the message is legitimate by checking the
published stated policy. With this, proper assessment of emails can be made. Once a message is proved fake,
then it can be marked as unwanted or unsolicited.


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