The Five-Ten website has a notice that they have retired the blacklist. Five-Ten wasn’t the greatest list for blocking mail, they aggressively listed senders and there were a number of false positives against a standard mail stream. But it was useful as a touchpoint. If I had a client that wasn’t listed on Five-Ten that told me something about their normal practices.
Two changes at the Comcast Postmaster page that I think are worthy of mentioning.
Read MoreRecently, an abuse desk rep asked what to do when customers were complaining about being assigned an IP address located on a blocklist. Because not every blocklist actually affects mail delivery it’s helpful to identify if the listing is causing a problem before diving in and trying to resolve the issue.
Read MoreThere is a new type of blocking designed to interrupt the ability of users to click and visit phishing sites.
DNS Response Policy Zones allows companies running recursive resolvers to create a zone that will not resolve specific domains. This is a second layer of filtering, if a spammer manages to get an email with a malicious link into the inbox then the ISP can still protect the user from becoming a victim from the scam. For more detailed information about RPZ, check out the helpful slides published by ISC.
Two blocklists announced this morning that they were publishing lists in RPZ format so ISPs can import the data into their DNS recursive resolver. SURBL is currently offering their list as RPZ. Spamhaus is currently running a beta for the DBL in a RPZ format. If you’re a current DBL user, talk to Spamhaus about checking out their new format.