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This does not appear to be an issue with Android as when I checked email from home yesterday evening using Firefox/Windows 10 WebMail, still no old email. This is not a catestrophic loss because my home computer has Thunderbird, which has copies of all of my email. Thunderbird is set up to download my email bu leave copies on the server.
If accidentally deleted, shouldn't the email, or at least some of them, be in my online Trash?
Which servers, Verizon or Yahoo, is mail in my online inbox stored on?
Finally, is there any way to see if I reached a size limit, i.e. too many emails in my inbox, that might have caused some action to automatically delete some of them? I would hope that I would receive some sort of message that I had reached a size limit.
Thank you for any comments or suggestions.