Submittable is a software program that handles submissions for literary magazines and arts organizations. Mid-October Submittable put out a call for Rejection Horror Stories, promising to post their favorites on their blog.
I wrote up a story that's haunted me for at least 15 years. The folks at Submittable liked it (or it scared them). Here's a link (scroll down; it's the fourth piece on the page):
Submittable 2018 Halloween Rejection Horror feature includes "Previously Published"