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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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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Disclaimer Support
Support adding a legal disclaimer (or other footer) to outgoing emails.
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Log All Outgoing Emails
Option to log all outgoing emails relayed through the SMTP/Exchange server ORF is bound to, not only those where the recipient of the outgoing email is added to the Auto Sender Whitelist Database.
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