Email Woes - Gobsmacked

[wayfaringwordhack]

Has anyone else had their entire mailbox emptied because they had not signed into the account in (according to the provider, and probably true) over a year?  I have an account that I use to store stuff, not really checking it, just sending stuff there.  Today I opened it, it still recognizes me, but it is completely empty. Not a single thing in it. 

It is a Yahoo! account. Does anyone know how I can get my info back?