AUTH LOGIN returns unicode 334 answer

[reikjarloekl]

With Python 2.7.3, I am getting the strange effect, that the answer to AUTH LOGIN apparently is transmitted as a unicode string which clients do not understand.

This is a tcpflow snippet demonstrating this:

046.163.077.142.01025-176.083.128.183.54917: 250-AUTH LOGIN PLAIN
250 EHLO
176.083.128.183.54917-046.163.077.142.01025: AUTH LOGIN
....163.077.142.01025-176.083.128.183.54917: 3...3...4... ...V...X...N...l...c...m...5...h...b...W...U...=...

Dots are zeros in tcpflow-speak.

If I change encode_b64 as follows (i.e., remove the final 'decode' statement), it works like a charm:

def encode_b64(data):
    '''Wrapper for b64encode, without having to struggle with bytestrings.'''
    byte_string = data.encode('utf-8')
    encoded = base64.b64encode(byte_string)
    return encoded

[thestick613]

Can you please post the full smtp transaction? Also, if you are trying to build a bigger system, you might want to try python-slimta.

[st2000]

Years later I see this same problem. However, running the server using python3 instead of python solved it. I only saw this problem when AUTH LOGIN is used. The test client in the examples directory uses AUTH PLAIN. And the server running under python works fine with AUTH PLAIN. Perhaps that is why it is difficult to reproduce the problem.