The problem I’ve noticed, is even when a user white lists our mail server, we STILL get marked as spam. Not always, but often enough for it to be an ongoing issue.
TFW you’re trying to work on one story, and circumstances cause the idea for a completely different one to pop into your head, and now a big chunk of your brain is trying to iron out the kinks, try different variations and make Story 2 work while you need to finish Story 1. 🫠