Send messages to thousands of recipients stored in excel via python.!!

Mail_from_Excel.py

import pip
xl_driver = pip.main(["install", "openpyxl"])
smtp_driver = pip.main(["install","smtplib"])

import openpyxl as xl
import smtplib
# Mail_from_Excel.py
# Send messages to thousands of recipients stored in excel via python
print("Welcome to Mails from Excel")
print("Fetching Data...")
workbook = input("Enter file name with extension:").strip()
wb = xl.load_workbook(workbook)
print("Done loading Excel file:")
sheet = input("Enter sheet name ").strip()
sheet = wb[sheet]
print("Done loading Sheet")
print("Getting Data from Excel Sheet...")

email_first_cell = input("Enter Cell Address of first Email:").strip()
email_col = ord(email_first_cell[0].upper()) - 64
mail_start_row = int(email_first_cell[1])

name_first_cell = input("Enter Cell Address of first Name:").strip()
name_col = ord(name_first_cell[0].upper()) - 64
name_start_row = int(name_first_cell[1])

if mail_start_row != name_start_row:
    k = input(f"Mismatch in Excel Workbook... Check {workbook} ...  Press any key to exit.")
    exit()

names = []
emails = []
for row in range(mail_start_row, sheet.max_row + 1):
    email = sheet.cell(row, email_col).value
    name = sheet.cell(row, name_col).value
    names.append(name)
    emails.append(email)

print()
print("Scanned emails shown below")
print(emails)
print()
print("Scanned names shown below")
print(names)
print()
my_name = input("Enter your Name:")
initials = input("Enter your Initials:")
print()

message_file = input("Enter Message file name with extension:")
message_file = open(message_file, encoding='ascii', errors='ignore')
message = message_file.read()
print("Message loaded successfully... message in next line.")
print()
message = message.replace("{my_name}", my_name)
print(message)
print()

subject_file = input("Enter Subject file name with extension:")
subject_file = open(subject_file, encoding='ascii', errors='ignore')
subject = subject_file.read()
print("Subject loaded successfully... message in next line.")
subject = subject.replace("{initials}", initials)
subject = subject.replace("worlds impending problems", "impending problems of worlds")
print(subject)
print()
print()

print("Starting Mail service...")
print()
email_user = input("Enter your email id:")
print()
server_name = input('''Enter the SMTP server name  ("smtp.gmail.com" for Gmail users) ''')
print()

server = smtplib.SMTP(server_name, 587)
server.starttls()
print("Server Started...")
print("Ready to send emails..  Template below...")
print()
print(f'''From: {email_user}\nTo: %s\nSubject: {subject}\n\n{message}''' % (", ".join(emails)))
req = input("Are you Ready to send emails (Y or N):")
if req != 'Y':
    exit()
print()

user_password = input("Enter Password:")
server.login(email_user, user_password)
print("Login Successful...")
for row in range(0, len(emails)):
    email = emails[row]
    name = names[row]
    message_send = message
    message_send = message_send.replace("{name}", name)
    mes = f'''From: {email_user}\nTo: {email}\nSubject: {subject}\n\n{message_send}'''
    print(f'''sending mail {row + 1} of {len(emails)}''')
    print(mes)
    server.sendmail(email_user, email, mes)
    print(f'''email sent {row + 1} of {len(emails)}''')

d = input(f"All mails sent successfully. Press any key and hit enter to exit.")
exit()