I can't always add them in my "safe senders" every time ... sometimes (for instance my insurance company - it's impossible to know what email address they will use). Last week it was a pdf from an Art Gallery, never got it, I contacted them, they sent it again : nothing, I sent a test email, they reply , then I got their email, the next day, another assistant (different email address) sent me the invoice... agin I didn't get it, I had to call the gallery ...), Well, when Microsoft decided to replace Hotmail by Outlook, my folder list changed to include them both – i.e., my Outlook inbox appeared at the top of my list of folders, and my Hotmail inbox appeared nearer the bottom. Both functioned in parallel, and I used both email addresses, for different purposes – a situation I was quite happy with., Why have emails have disappeared from my hotmail Inbox prior to March 4, 2023?.