import email


PAYLOAD = """MhME: 1.0
Subject: m
From: J
Tone: m
Content-Disposition: attachment; filename=""
Content-Transfer-Encoding: base64
eId:
f0AG
AAAA

AAAA
AAAA
AAAAbase6-
"""


def main():
    msg = email.message_from_string(PAYLOAD)
    for part in msg.walk():
        crashes = part.get_payload(decode=True)


if __name__ == '__main__':
    main()