Yahoo, the internet giant, has been sued for the reason of negligence right after it revealed that there were nearly 450,000 usernames and passwords stolen from a particular website they are holding.
The newly appointed Chief Executive Officer Marissa Meyer remarked that the company is being sued and will be facing court proceedings after one of its users have filed a complaint. According to the complaint filed in court, the login information of this particular user was posted online without his knowledge and permission.
According to the user identified as Jeff Allan, the web portal operator is guilty and should take its responsibility as it did not succeed in sufficiently protecting his personal information such as his login details. The user was said to have been alerted about the condition after getting a fraud warning coming from his account in eBay. Allan remarked that this must be taken into action and he is seeking for reimbursement for himself and with the other users as well.
It seems that the information appeared online subsequent to the event when the hacker broke into one of the databases of the company.
With this, Yahoo immediately fixed the issue. The security failing was then patched up the next day after the announcement was disclosed to the public. The web portal operator later affirmed that a number of user accounts were compromised.

I think that there are some cheap problems occur in the yahoo mail and users affected by it. Try to solve the problem very soon.
i am using yahoo for last five year but i have not face any types of problem that you have share in your post but some person are here that have to face this types of problem.