I am having an issue with my Yahoo account. I was able to log in yesterday and today it says "Sorry, we don't recognize this email." I sent an email to that email from another email, and I got a delivery error email. What is the next step to do? This account is really important to me. I want to get my account back. I would do just about anything. I had very important emails, files, and contacts on there. I feel like I can't go on. I am so desperate. Please help!