After an illegal access to my account i don't receive emails anymore, what to do?

[Kuku Kajoob ♫]

Things to check if your email has been compromised

Always change your password, when anything strange is happening

Change Password :
https://edit.yahoo.com/forgotroot/

Other things to check: Your mail is being re-directed
http://help.yahoo.com/kb/index?page=cont...=PROD_ACCT

Things to do if your ID continues to send out spam:
http://help.yahoo.com/kb/index?page=cont...sions=true

If you recently replied to a email from "Yahoo" wanting you to verify your acct.
It was hacker. Never log into an acct from a link in an email
This is how you tell a real email from Yahoo
http://help.yahoo.com/kb/index?page=cont...=PROD_ACCT

Since these are Nigerians online are the source of much criminal activity
I would close the email address.