DKIM now installed

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DKIM (DomainKeys Identified Mail) is now running on my server. I don’t think there are enough sites using it yet for it to have been worth my effort (it was more effort than I expected it to be), but now it’s done, so we’ll see.

Of course, if everyone else also said “It’s not worth the effort, and I’ll wait to see if it gets adopted”, then it will never reach critical mass.

For now, the only really useful thing is that I can now credibly (and easily) toss all email that purports to be from any of my originating domains to us. My spam filters did a reasonably good job tossing those, but now I should be 100% sure that an email claiming to be from a domain that I control, actually is from there.

I had hoped that another benefit would be verifying that any email from yahoo.com was legitimate (since that’s such a popular spamming return path). Unfortunately, while Yahoo! definitely supports DKIM (and the original DomainKeys), many legitimate yahoo.com users don’t send their emails through the Yahoo! smtp servers, so their emails don’t get signed. Oh well.

In any event, I’m now an enabler of the future of anti-spam measures, rather than a laggard. 😉

Next step on this train is likely to be greylisting. There is a lot to like about it, but a lot to be wary of from a business perspective. I didn’t give a link because I’ll do that if I install it and get it running.