Spam filters can never be 100% efficient. Smartermail has the ability for system administrators to see the recent traffic passing through the spool. It will quickly identify Its and mail servers which have sent or attempted to send higher levels of email through the server. Sometimes this reveals certain tell-tale patterns of spam. A good indicator is a [...]

I like greylisting, not least of all because it’s a British invention which forces the Americans to spell ‘grey’ as ‘grey’ not ‘gray’; but joking apart: Greylisting is a technique which ON A PER USER basis looks at the email sender’s address and, if not encountered previously within a specified time period, rejects the email and asks the [...]