Your thread heading indicates that you may well be aware of the solution. Go to imap. With imap you can view all emails (received and sent) on all devices. I use imap with Outlook on my pc, Thunderbird on my laptop, android on my phone and on my iPad. The settings will depend on your domain name/provider.
How to get Windows 10 now: how to download and install Windows 10 even if GWX.exe is missing