Mail is not sent to multiple users

[ur00361883]

THe code works fine for a single email address.
But if I add multiple email addresses, then it is being received by only the first email adress and the others are not getting that.
But I can see them in the to list, in the received mail and even in the sent items of gmail.When I click on reply all manually then they are receiving.

Please suggest.

import time,datetime
import os

import smtplib
from email.mime.text import MIMEText
from email.mime.multipart import MIMEMultipart
import binascii
import struct

#import datetime as dt
import string

def send_gmail2(subject,attach_file=None):
    email_content = """
    Hi All,

    %s.
    This mail sent from build machine.
                    """ % ( subject)

    new_msg = {
                    "content": email_content,
                    "from_address": "[email protected]",
                    "to_address": "[email protected],[email protected]",
                    "subject": subject
              }
    process_send_gmail("upd.bin", new_msg,attach_file)





def process_send_gmail(upd_path, msg, attach_file=None):
    #account = get_cred_from_file(upd_path)
    account = get_cred()

    msg_body = MIMEMultipart()
    msg_body['From'] = msg["from_address"]
    msg_body['To'] = msg["to_address"]
    msg_body['Subject'] = msg["subject"]
    msg_body.attach(MIMEText(msg["content"]))
    if attach_file is not None:
        attach_file = attach_file.replace("\"", "").replace("\'", "")
        file_name = os.path.basename(attach_file)
        att1 = MIMEText(open(attach_file, 'rb').read(), 'base64', 'utf8')
        att1["Content-Type"] = 'application/octet-stream'
        att1["Content-Disposition"] = 'attachment; filename="%s"' % file_name
        msg_body.attach(att1)

    print "Start to send mail"
    s = smtplib.SMTP("smtp.gmail.com")

    # s.set_debuglevel(1)
    s.ehlo()
    s.starttls()
    s.login(account["user"], account["pwd"])
    s.sendmail(msg["from_address"], msg["to_address"], msg_body.as_string())
    s.quit()
    print "Mail sent"


def get_cred():
    return {"user": "[email protected]", "pwd": "****"}

send_gmail2("Ant War file creation completed with success or failure.Please check the log file: ")