Spam filtering progressing
Spam has increased dramatically lately, and the old filtering on agora is even less capable of coping. There is help on the way though: I’m making good progress on a new front end filter that will not only be running current spam and virus filtering, but it will eventually allow better user control over how it works. It currently does:
- white/blacklist processing
- greylisting (if mail hasn’t been seen before from this sender, issue a temporary error once and see if they retry it — real servers will, spammers often won’t — this is cutting the load in half on agora even now)
- spf (checks to see if the mail is coming from a server authorized to send mail from the sender’s stated domain, for those domains that have listed authorized servers, this cuts down on forged mail)
- checking with a current version of spamassassin to see if it’s spam or not
Still to do:
- quarantine suspected spam
- check with a virus checker (clamav) and quarantine suspected virii
- provide user access to white/blacklists, quarantine and enable/disable various filter options
I should have the spam and virus checking working this week, and hope to have the user interface done next week.
If anyone gets a reasonable amount of mail (at least several daily) and wants to be a guinea pig, let me know (preferably if you have your own domain, but there’s some value in forwarding through it as well…)!