https://help.yahoo.com/kb/recover-deleted-email-trash-folder-sln4849.html
https://www.techwalla.com/articles/recover-deleted-yahoo-email-messages
Yahoo现在是个没人疼爱的流浪儿。赶紧换一家吧,Google gmail, Microsoft outlook mail都很好,至少不会三天两头被黑。
https://www.wikihow.com/Switch-from-Yahoo!-Mail-to-Gmail