SPF, part 2: how to configure SPF for a domain
(this is part 2 of a series. You should read part 1 first, and after this post you should read part 3.) Suppose you have a domain and send email from it (in fact, even if you don’t, this is still a...
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What’s this site running?
As an intermission (there’s more to come in the SPF series), here’s what’s changed on my server since, oh, about a year and a half ago: The OS is now Ubuntu Karmic Koala (9.10), and all the server’s...
View ArticleSPF, part 3: configuring Postfix to check SPF records when receiving mail
(for extra fun, read parts 1 and 2 first.) Now that you know how to configure an SPF record for your domain(s), the natural next step, if you administer an email server, is to start checking SPF...
View ArticlePostfix’s log file when using SPF: what it looks like
In the previous post, I wrote, at the end of the recipe: restart Postfix. Check your logs to see if everything is working properly. But what to look for? Here are a few real life examples, from my own...
View ArticleWhat if everyone used SPF?
To end my SPF series, I’m going to consider the following question: what if everyone used SPF? Would it “end” spam? The answer is, of course, “no, but…”. But, first, let’s understand the question...
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