Expert: Molinari replied 2 years ago.
Hi, thank you for asking your question on JustAnswer.
Actually, hundreds of Yahoo Mail users are having this exact problem. All at the same time. Yahoo is not offering any explanations. If hundreds of users have the same problem, it becomes a Yahoo problem. There is a strong chance that there is no "suspicious activity". It's just another problem caused by Yahoo's recent upgrades to the site. You have to wait a few hours or days until Yahoo fixes it. No one has figured out a workaround. It's almost a sure bet it's them and not you...
Whoever is answering their twitter account is getting buried with the same problem:
http://twitter.com/#!/yahoomail
If it doesn't clear up in a few hours, you can try this:
Usually yahoo issues this message when your e-mail account may have been hijacked and used for spamming. To find the spamming source and to make sure that it isn't you causing this, Yahoo has to temporarily shut down your mail account. During the suspension, you have access to all email in your inbox, personal folders and sent folder, and to your mail options. You will not be able to send or receive mail or save any drafts. Email sent to your account will bounce back to the sender.
Probable causes
1: Somebody may have tried to enter your account without being authorized, and he may have tried to do so a couple of times. After a couple of failed attempts to open your mail account, Yahoo also temporarily shuts it down for security measures. In some cases a user may not even try to get into your account, but he may want to cause trouble for you - he just knows that after a couple of seemingly unauthorized attempts to enter your account, Yahoo shuts it down for a couple of days. Often an automated program is used for this which can send more than 1000 requests a minute. The Yahoo servers detect that a human can't be behind such attempts and presto, the account is shut down.
What you can do is go to:
http://login.yahoo.com/config/login . After your first try you may get a failure message, but when you try again, you'll see a captcha link. Only real life people could handle this correctly, spambots can't read it. If you are lucky, you may be able to enter your account at this point.
2: If you send large amounts of mail, even if it is for non-profit organizations, Yahoo may close your account temporarely because their program can't tell the difference between a supposed spammer and a real one.
Summary: if the login hack doesn't work, wait a little, a suspension usually lasts about 48 hrs. If you then still can't get in, go to this online help form and describe your problem:
http://help.yahoo.com/fast/help/us/mail/cgi_ymail
You could also send a mail to e-mail support:
mail @ cc.yahoo-inc.com
or
mail-classic-errors @ cc.yahoo-inc.com
or call Yahoo! Customer Service: 1.866.562.7219, 1.408-349-3301, 1.866.492.4664 , 1.408.349.3300,1.408.349.1572 or 1.866.850.4303.
You can you also Tweet them, or click the following link to chat with them >> yahoo chat support the chat option is just below the yellow box, in the mean time, you may be able to send email messages at:
http://us.mc330.mail.yahoo.com/mc/welcome?ymv=0
and/or
http://m.yahoo.com/w/ygo-mail
Let me know if you run into any trouble...