Python smtplib bcc issue

charset = email.Charset.Charset('utf-8')

header = email.header.Header(charset = 'utf-8', header_name = 'Bcc')

bccaddrs = []

for user in [{ 'name': u'John Doe 1', 'addr': 'johndoe1@gmail.com' }, { 'name': u'John Doe 2', 'addr': 'johndoe2@gmail.com' }]:

    user['name'] = charset.header_encode(user['name'].encode(charset.output_codec))

    addr = email.utils.formataddr((user['name'], user['addr']))

    bccaddrs.append(addr)

payload = ''

payload = payload + 'Subject: test subject\n'

payload = payload + 'From: <johndoe0@gmail.com>\n'

payload = payload + '\n'

payload = payload + 'test message'

server = smtplib.SMTP('smtp.gmail.com:587')

server.ehlo()

server.starttls()

server.login('johndoe0@gmail.com', 'password')

server.sendmail('johndoe0@gmail.com', [ 'johndoe1@gmail.com', 'johndoe2@gmail.com' ], payload)

server.quit()