What happened to my zoho.com mail?

What happened to my zoho.com mail?

I just posted videos promoting my book using my zoho.com mail account and now I can't see it, send a mail to it or even find it.  What happened?  Is it no longer a service?  I invested a bit in making the video was that all wasted because Zoho couldn't be bothered telling me the account no loner works?