Your search for "filtering" returned 43 results:
New Action: Drop Email Silently
Add a new action to ORF that allows dropping the email silently at On Arrival, without returning an SMTP response to the sending server. It would appear that the local server accepts the blacklisted email, but it would cancel the delivery without telling the sender.
4 comments
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DONE Add the SPF Test to the Whitelist Test Exceptions
Extend the current list of the Whitelist Test Exceptions with the ability to exclude the SPF Test from the whitelist tests. This would allow checking for forgery even if the sender is whitelisted, e.g. by the Auto Sender Whitelist.
DONE Support for DomainKeys Identified Mail (DKIM) RFC 4871
DKIM uses public-key cryptography to allow the sender to electronically sign legitimate emails in a way that can be verified by recipients. Prominent email service providers implementing DKIM (or its slightly different predecessor, DomainKeys) include Yahoo and Gmail. Any mail from these domains should carry a DKIM signature, and if the recipient knows this, they can discard mail that hasn't been signed, or that has an invalid signature.
Learn more at http://dkim.org.
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Run Specific External Agents on All Email
By ignoring all of the whitelists in ORF, run selected External Agents on every email seen by ORF. This would allow anti-virus software to run on outbound emails, too. This is is currently prevented by the IP Whitelist and the Authenticated User Whitelist. By ignoring these whitelists, outbound emails may also be verified against malicious content (when submitted using SMTP).
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