E-mail problem, should I concerned?

I sent an e-mail to someone who I trust, but have never e-mailed before. I got a reply from Earthlink (her browser) that said she did not accept unknown e-mail, and asked me to fill out a brief information sheet, including my e-mail address....MISTAKE!! Now I am bombarded with Lottery winning, pleas from Uganda to transfer money, UK lottery winning, up to a couple of dozen a day. Someone has hacked into Earthlink it seems. I don't open these e-mails, just delete them. Should I be concerned that they could affect my computer? I have anti-virus and anti-spyware installed. Thanks