I had this issue last year with Verizon. My emails did not go into trash or spam, they just disappeared. It took 6 months and many calls to Verizon help before I found an "expert" who identified the problem which turned out to be a common one. Keep checking with your email provider until you magically get connected to someone who knows what to search for. Same thing just happened to me with a retailer I like a lot. I stopped getting emails and after 4 different conversations to help the 4th person easily identified the problem the first three overlooked.
My emails evidently bounced for months for random companies and some removed me from their lists after getting a few bounced emails. One msc that only sends out emails about jobs instead of having a list on a website must have bounced me. They are now using a scheduling site. I applied for my first shop with them in over a year due to not seeing shops for that long. They cancelled my accepted shop saying that I had flaked on a job during the time when I did not even get messages about jobs. They refused to look into the issue for me and kept insisting I was off their records due to a flaked job. In all the years I have mystery shopped I have never flaked. So good riddance to that company. They had few shops in my area anyway.
Bottom line, be careful about bounced emails. If you can make sure to reconfirm your email with the companies you deal with after you get this fixed.