How do I e-mail someone?

HELP???someone else is receiving MY email HOW CAN THIS HAPPEN? HOW CAN I FIX IT?

• my friend answered my email and it got sent to a mutual (EX-FRIEND)aquaintences email account. My address was in the address bar and nothing else how can this happen? I used this persons(ex-friends) computer to check my email a long time ago(6-7months) could that have anything to do with it? I have since changed my password at least 8 times and even made a new email account with a different login name and THAT is the address to which the mail was sent and the person (ex-friend)who received it doesn't even know that email address exists and I didn't have it 6 months ago.Is it possible that she can get into my email account? But how would she know the new one? Can anyone help me with this? Has this ever happened to anyone before? This is the second time it has happened involving the same person(ex-friend) but a different sender. I hope someone can help because this is very un-nerving. Thanks!

• Answer:

  contact yahoo, you are being hacked. change the password as to something very hard for them to guess. PS-this is illegal. it happened to a friend of mine at work. it only took a letter and a phone call from the law for it to stop. then yahoo set her e-mail up with her to avoid any more problems. good luck. (try setting the hacker up with juicy gossip, sit back and laugh)