When you update a post, and then hit Publish, Ghost defaults to emailing it again. It should not. It should default to simply saving updated posts, or at least make that a selectable option. It’s too easy to update a post and accidentally spam it your entire list.
If there is a default setting and I have missed it, my apologies.
This isn’t the expected behavior — when updating a post that’s already been emailed, it shouldn’t be sent out again. Is that what you’re experiencing?
It did, which I’m reasonably sure it hasn’t in the past. I’m now wondering if there was a glitch at the mailgun side where what I really saw was some delayed sends, not a re-send/