Your search for "filtering" returned 43 results:
DONE Honeypot (Spamtrap)
Blacklist the sender IP address of those writing to specific local email addresses, e.g. addresses published on
the company web site specifically as honeypot (spamtrap) addresses. This feature would be based on the assumption
that whoever sends email to the honeypot address(es) must be a wrongdoer, because the honeypot address may be
collected only by robots scanning the internet (and the web, specifically) for email addresses, which is a typical
spammer behavior.
11 comments
DONE Directory Harvest Attack (DHA) Protection
Add a new test to ORF that would temporarily reject all delivery attempts if the sending IP address is sending to more than "X" (user-configurable) non-existent recipients within in a specified period of time. This would provide some protection against poorly distributed or non-distributed Directory Harvest Attacks.
DONE Update SPF Test To The Latest RFC
ORF implements an earlier (draft) version of the SPF specification instead of the final version RFC 4408. Update the SPF implementation in ORF to RFC 4408.
33
SCL Scoring
Add new SCL blacklist action to ORF. This action would set the Exchange SCL score of the blacklisted email.
10