Hi folks,

I encountered the following error with this Python code snippet. (I ran
it with Python 3.0.1). Judging from the error as shown in IDLE debugger,
the error was buried inside python. 

  try:
    server = smtplib.SMTP(EmailConfig.smtpServerName)
    server.set_debuglevel(3)
    print(server)
    server.login(bytes(EmailConfig.mailUser, encoding='ascii'),
bytes(EmailConfig.mailPass, encoding='ascii'))
    print('Login is successful.')
    failed = server.sendmail(from_addr, to_addr, text_msg)
  except Exception as ex:
    print('Error in communicating with SMTP server', ex)
  else:
    if failed : print('Failed in sending email with following
reason:\n', failed)


***********************************************
The output from terminal is:
$ c:/tools/Python30/python send_email.py
<smtplib.SMTP object at 0x00F21990>
send: 'ehlo quad-vision.hua\r\n'
reply: b'250-smtp.mxes.net\r\n'
reply: b'250-PIPELINING\r\n'
reply: b'250-SIZE 400000000\r\n'
reply: b'250-ETRN\r\n'
reply: b'250-STARTTLS\r\n'
reply: b'250-AUTH PLAIN LOGIN\r\n'
reply: b'250-AUTH=PLAIN LOGIN\r\n'
reply: b'250-ENHANCEDSTATUSCODES\r\n'
reply: b'250-8BITMIME\r\n'
reply: b'250 DSN\r\n'
reply: retcode (250); Msg: b'smtp.mxes.net\nPIPELINING\nSIZE
400000000\nETRN\nSTARTTLS\nAUTH PLAIN L
OGIN\nAUTH=PLAIN LOGIN\nENHANCEDSTATUSCODES\n8BITMIME\nDSN'
Error in communicating with SMTP server b2a_base64() argument 1 must be
bytes or buffer, not str

This is a duplicate of issue5259, and has been fixed in 3.1.