How to stop an email from someone?

You recently added a new email address to your Yahoo! account, or initiated verification of an existing email address. To verify that you own this email address, simply click on the link below. Your email address was added to the Yahoo! ID: ge******...

my poor father and several other people on my yahoo email contacts got an email from my yahoo email but i never sent it. i actually was a recipient of the email as well. it all makes no sense. the email has no subject in the subject line and when you...

All of a sudden something happened to my yahoo IM. I am being notified in my IM, by sound alerts, when people in my yahoo email address book log on to yahoo. (not yahoo IM) II do not know how to disable this. I went to the address book part of my friends...

To Yahoo, Recently I sent out 50-60 emails from my address book. I was told by all of the senders that each email also included a message (which I did not write or authorize) that included a link. Many of the links were to pharmaceutical companies advertising...

Every morning I have 100+ emails returned with messages saying my emails could not be sent because of people being "out of the office" or because a spam filter or bulk email would not let my email be sent. The thing is, I did not send these...

I have an email account through Geocities.com that refers mail sent to [anyname]@[mywebname].com to my Yahoo email account. I have started getting "undeliverable email" messages that show a message coming from [randomletters]@[mywebname].com...

I cant even do an ebay account because someone used my email address there.

We can avoid receiving emails from some members or ban some members but we cannot prevent the receipt of email from a particular email address when the mailing group is set to able to receive email from the general public.

My yahoo messenger got high jacked or hacked into but the other area's of my account are not tampered with i.e. mail and yahoo answers which I don't understand. I know its a former friend of mine but i don't want to give up this email account because...