multiple email recipients

[eight02645999 at yahoo.com]

hi
i currently am using this email function that can send single email
address
def email(HOST,FROM,TO,SUBJECT,BODY,CC=None):
    import smtplib
    import string, sys
    body = string.join((
    "From: %s" % FROM,
    "To: %s" % TO,
    "Subject: %s" % SUBJECT,
    "CC: %s" % CC,
    "",
    BODY), "\r\n")

    server = smtplib.SMTP(HOST)
    server.sendmail(FROM, [TO,CC],body)
    server.quit()

was wondering how to modify the code so as i can send to multiple email
recipients using "TO"? thanks.