My yahoomail accounts used by someone.

you should change your password and if you are using public computer then don't save your user name or password or delete cookies, history. If you are more conscious about your mail then change your password in every 6 months

Immediately change your password and send a email to all your friends about the problem - some of your friends may have actually got messages from the hacker. Sometimes viruses can do this automatically and also some spam emails look like this. Better safe than sorry!

What a scarey thing to have happened. Such an invasion of privacy, huh? I hope you've changed your password. I've begun changing mine at least once a month. I have to keep a journal by the computer so I'll remember what it it...lol. You might want to consider sending a quick email to the people in your address book to watch for anything received 'from you' that looks out of character. A short while ago I started receiving emails from a friend using an account that she hasn't used for several years. It looked like a link to access some kind of offer from Home Depot. It was suspicious because it was poorly worded and had misspellings. So before opening it, I called her. She, of course, had not sent it, and several of her friends had received them too. I deleted it, but received several more over the span of a couple of weeks. It's scary to think that email spammers have (and use) addresses that they harvested years ago. With that happening, the idea of only opening emails where you know the sender is not even reliable. You almost have to scrutinize everything you receive now. Good luck to you!

I experienced the same situation. Worst is, the person who hacked my account changed my password and keeps on sending hate messages to my friends. I asked several computer techs on how to retrieve my password and what can I do to stop the hacker. He told me it is difficult for me to get back my account. He advised me to create a new account instead and inform my friends of what happen. In your case, I would suggest that you change your password now before the hacker can do it and prevent you from accessing your account.

I know yahoo mail contains some password number.If nobody don`t know your password he cant logged on your account.I think its your known person its not then i will suggest you to close the account.

Don't worry!!it's nothing.change password. what i want to say,because of my poor english,i can't express my advise.sorry!!

hello you can recived this error e-mail one day after that you send some e-mails. You can comprobate ifone or two days before you send some e-mail to this adresse that can produced this error

you can also report those to yahoo. or delete all your address book or send your friends a warning about the fail email. if you could, open a new email address and let your friend know.

How can it be accessed by someone..do you opened your account somewhere and forgot to logout? I suggest you change your password just for security reasons. btw how many email account do you use?

There are several websites out there that when you sign up with them they import your address book & send messages to your friends under your name asking them to join. I have had several friends who have joined these sites & atleast once a month I receive a request under their name asking me to join. When I complained to my friends, they said they joined but didn't like the site & left. One person it has been over a year & I'm still receiving the emails. These sites don't have your password & do not go back into your account. They just steal your address book at the time you join & harass your friends. When a friend changes email addresses, the notice will come back to you as they cannot redirect them to their site. I've not heard of a way to stop these sites. From what I have been told they do not compromise your Yahoo account just your address book at the time they can steal it. Good luck with your problem. I hope changing your password takes care of the problem.

I am glad that you changed your password because that was the first thing that I was going to suggest. Hackers have nothing better to do and we all know that.... just hope that it was them and not your significant other checking your email :). I had a similar experience to this and it was my freakn bf who hacked my account. I was lucky that there was nothing juicy in there.

Always Log Out and clean cookies. Change password and use with some simbol in your password. Its hard to trace.

Sounds like you might have a virus on your computer. I dont know but I had one on mine once and it sent out messages to all of my friends in my address book, and the messages were not something I ever would have sent. Or you may have been phished. What I would do is run a virus scanner just to make sure you dont have a virus and then I would change your yahoo pass word just to make sure that no one has it. The other thing that it might be too is a glitch in yahoo. I have sent messages before and then like a month later it was returned to me as undeliverable. When I open it I dont remember sending it but I am sure its me that did it but I just cant remember when. LOL. Any way I am hoping that you have not been hacked or attacked and its just a silly yahoo glitch. Good luck finding out what it is either way.