The new edition of my newsletter, ORBITAL OPERATIONS, went out on Sunday night. I just switched from a self-hosted solution to the fine Campaign Monitor. This has inevitably caused some confusion, and some people are telling me they didn’t receive the Sunday edition. Here are some reasons why.

* You don’t check your spam filters. You or your system marked it as spam at one point, and now it sits there in a pit, riddled with punji sticks, bleeding out while it waits for you to notice it’s there. Some email systems may also have renditioned it into Promotions or some other filter cage.

* You spelled your email address wrong when you subscribed. Because, seriously, I have proof of those.

* You tried to have it delivered directly to your Kindle. Which doesn’t work very well, believe me.

* Your email provider doesn’t like bad words. There’s someone in a professional services company in the south of England who gets maybe one email in twenty because it kills any message with a word stronger than “heck” in it. And “heck” is not a word I use.

* Your email inbox is full because you’re a lazy git.

* You never actually subscribed. You can subscribe at orbitaloperations.com.

And if you missed Sunday’s edition, it’s up on the web at this link. It has pictures of things you haven’t seen before and other attractive qualities.