Mass Mail Sending script

Last semester, I was honored to be a teaching assistant of digital image processing. I need to send the corresponding score to each student after checking each assignment. Hope to this code may help other teaching assistants

#copyleft Mei_Jiaming 2020
#@ShanghaiTech University
import pandas as pd
import numpy as np
from string import Template
import smtplib
from email.mime.multipart import MIMEMultipart
from email.mime.text import MIMEText
import socket

MY_ADDRESS='XXXX@outlook.com'
PASSWORD='XXXXXX'

data=pd.read_excel('hw4total.xlsx')
length=data.shape[0]
message_template=Template('Hello $name, your homework4 has a total score of $Total, including $Basic for the Basic, $Bonus for the Bonus.')
#message_template=Template('$name $email $Q1 $Q2 $Total')


s = smtplib.SMTP(host='smtp-mail.outlook.com', port=587)
s.ehlo()
s.starttls()
s.login(MY_ADDRESS,PASSWORD)

for i in range(length):
    data_i=dict(data.loc[i])
    msg = MIMEMultipart()       # create a message
    message = message_template.substitute(data_i)
    print(data_i)

    msg['From']=MY_ADDRESS
    msg['To']=data_i['email']
    msg['Subject']="Homework4 score"
    msg.attach(MIMEText(message, 'plain'))
    s.send_message(msg)
    print("SENT EMAIL TO ", data_i['name'])
    del msg
    #add waiting time
    print('type anything or nothing and press Enter (Prevent sending blocking ):')
    x = input()
    print('Hello, ' + x)
s.quit()