I never get notices from Pixels, just from FAA. I use an Aol email address for my main account here. Nothing from FAA ever goes to spam. I either get the notices or not. I never got an announcement for my last 12 sales. If I follow a thread, the notices can come in anywhere from a few minutes to a few days after each new post, if ever.
BTW AOL is the number 4 most popular free web email service.