Stewart- Saturday, April 20, 2013, 9:08:58 AM, you wrote:
> I have a business account with Shaw and host my own email server > for my business. Every few months, I wonder why people are not > getting my emails. It turns out that Cloudmark has blacklisted my > domain and email is going into people's Spam folders as a result. I used to work at Cloudmark. Unless things have changed drastically there, Cloudmark doesn't maintain blacklists. There are several heuristics used to determine the spam blocking threshold, and the blacklist approach is one of the least reliable brute force methods. The most effective algorithm used by Cloudmark is crowdsourcing: when a user reports a message as spam, both the email message and the user get a reputation rating. If more users report the same message, then the rating of the message and the user go up. If more users report the message as a false positive, then the message's rating goes down, but so does the original reporter's. If a message passes a given threshold then it's declared spam unless further reports bring down its rating. If you successfully report several spam messages then your reputation goes up and further spam reports will carry more weight. The blacklists are maintained by SpamHaus, SpamCop, SORBS, etc., and if you find out which lists are blocking your domain (or worse, the ip address or block of ip addresses of the server) then you can email the appropriate parties to be taken off the blacklist. They usually respond pretty quickly, but I have to say I've never liked the blacklist approach. -- -Mark Wieder mwie...@ahsoftware.net _______________________________________________ use-livecode mailing list use-livecode@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode
