Direct ClamAV Anti-Virus Support
Add documentation and/or more direct binding to the free ClamAV anti-virus, including the phishing signatures.
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Add DomainKeys Signatures to Outgoing Emails
DKIM requires outgoing emails to be signed with a special signature, so if a recipient knows that all legitimate emails sent from your domains are signed with such signatures, they can drop spoofed emails (which are unsigned or have an invalid signature). This feature would allow ORF to add DomainKeys signatures to outgoing emails. For more information about DomainKeys, please visit http://dkim.org/.
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Bayesian (or Other Statistical) Filtering
Add a new statistical filter test to ORF. The most widely known and used statistical technique is Bayesian filtering, a "learning" email classification method. When properly trained and maintained, statistical filters work very effectively.
However, they require a reliable feed of actual legitimate and spam messages for initial training, so end-users are likely required to participate in the training.
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Test IPs Found in URLs Against Online DNS Blacklists
ORF currently checks only the IP (where the email was sent from) against online DNS Blacklists. This new option would allow checking IPs found in URLs as well.
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