Showing posts with the label google public dns

HOWTO: Query Spamhaus Safely

You'll recall me warning recently that using Spamhaus data to protect your mail server is a bad idea if you're using open or public DNS resolvers . TL;DR? Spamhaus is worried about too much traffic via public channels but blocking is implemented in a way that makes it effectively intermittent and potentially confusing. You could be fine for weeks and then suddenly you start bouncing…
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Be careful: Using Spamhaus with open resolvers is bad news

Do you use any of the Spamhaus blocking lists (DNSBLs) to protect yourself from inbound spam and email threats? If so, you're not alone. The Spamhaus data is quite popular and used by many ISPs as a front door gatekeeper for IP (and domain) reputation.

Spamhaus Blocklist Changes

Speaking of Spamhaus, this just popped up in my RSS feed reader. It looks like Spamhaus is going to take a harder stance against users who query their lists via open or public DNS systems (such as Google Public DNS or Cloudflare's 1.1.1.1 Service). They're going to r…