o365 special subject mail download issue

[anna]

Hi,

I am getting specific mail in Inbox with subject 'ACTIVE DSL DUMP EPOS' on daily basis, with extension .gz. I am trying to download attachment, however I am getting error. Below is the my script, post reading some online docs.

import imaplib
import email
import os

save_path = '/home/downloads'

mail = imaplib.IMAP4_SSL('outlook.office365.com')
mail.login("xyz.com", "Abc1@2015")
mail.select("Inbox")

typ, msgs = mail.search(None, '(SUBJECT "ACTIVE DSL DUMP EPOS")')
msgs = msgs[0].split()

for emailid in msgs:
    resp, data = mail.fetch(emailid, "(RFC822)")
    email_body = data[0][1]
    m = email.message_from_string(email_body)

    if m.get_content_maintype() != 'multipart':
        continue

    for part in m.walk():
        if part.get_content_maintype() == 'multipart':
            continue
        if part.get('Content-Disposition') is None:
            continue
        filename = part.get_filename()
        if not os.path_exists(save_path):
            os.makedirs(save_path)
        with open(os.path.join_path(save_path,filename), 'wb') as fp:
             fp.write(part.get_payload(decode=True))

Error:
Traceback (most recent call last):
  File "eposDatadownload.py", line 17, in <module>
    m = email.message_from_string(email_body)
  File "/usr/local/lib/python3.6/email/__init__.py", line 38, in message_from_string
    return Parser(*args, **kws).parsestr(s)
  File "/usr/local/lib/python3.6/email/parser.py", line 68, in parsestr
    return self.parse(StringIO(text), headersonly=headersonly)
TypeError: initial_value must be str or None, not bytes