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It certainly doesn't solve the spam problem by itself, but as someone still DIY hosting their email, I find the Spamhaus Zen DNSBL has non-zero usefulness. Most
by _delirium 2y ago
It certainly doesn't solve the spam problem by itself, but as someone still DIY hosting their email, I find the Spamhaus Zen DNSBL has non-zero usefulness. Mostly filtering out some of the botnet spam that gets past the initial "must have RDNS than matches forward DNS" Postfix check (which gets a bigger chunk of it).
- nurple 2y agoI still love using DNSBL as part of a score-based approach. Add Bayesian filtering, spf/dkim scoring, a greylist, and postfix options like RDNS checks. I see a few spam a week, have never seen a false positive. I think greylisting made the biggest difference after sane-sender checks.