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121 lines
3.2 KiB
Python
121 lines
3.2 KiB
Python
#!/usr/bin/python3
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from string import ascii_lowercase
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from random import choices
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from argparse import ArgumentParser
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from smtplib import (
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SMTP,
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SMTPSenderRefused,
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SMTPRecipientsRefused,
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)
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def check_clear(domain, port, orgin_domain, from_addr, to_addr, log_level):
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with SMTP(host=domain, port=port, local_hostname=orgin_domain) as smtp:
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smtp.set_debuglevel(log_level)
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try:
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smtp.sendmail(
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from_addr=from_addr,
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to_addrs=[to_addr],
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msg="test_cleartextmail"
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)
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except SMTPSenderRefused as error:
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code = error.smtp_code
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error = error.smtp_error.decode()
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if code == 530 and "STARTTLS" in error:
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return False
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else:
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raise
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except SMTPRecipientsRefused:
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pass
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return True
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def color(string, color_name):
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color_code = ""
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if color_name == "green":
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color_code = "\033[92m"
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elif color_name == "red":
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color_code = "\033[91m"
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elif color_name == "orange":
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color_code = "\033[93m"
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end_color = "\033[1m"
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return f"{color_code}{string}{end_color}"
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def main():
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parser = ArgumentParser(
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description=(
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"Script to check wether or not the target mail server accepts "
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"cleartext connections and email from other smtp relay"
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)
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)
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parser.add_argument(
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'domain',
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type=str,
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help="domain to check"
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)
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parser.add_argument(
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'-p',
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'--port',
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type=int,
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default=25,
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help="port for STARTTLS (usually 25)",
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)
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parser.add_argument(
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'-f',
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'--from_addr',
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type=str,
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default="foo@example.com",
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help="address to use to check the server (default foo@example.com)"
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)
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parser.add_argument(
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'-t',
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'--to_addr',
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type=str,
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default="",
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help="address of the recipient (default [random]@[domain])"
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)
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parser.add_argument(
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"-v",
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"--verbose",
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action="store_true",
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help="Activate verbose mode an display all smtp trafic"
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)
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args = parser.parse_args()
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origin_domain = args.from_addr.split("@")[-1]
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rand_char = ''.join(choices(ascii_lowercase, k=64))
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to_addr = args.to_addr if args.to_addr else f"{rand_char}@{args.domain}"
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print(
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"Testing if the server support clear text email delivery:",
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end=' '
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)
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try:
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result = check_clear(
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domain=args.domain,
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port=args.port,
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orgin_domain=origin_domain,
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from_addr=args.from_addr,
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to_addr=to_addr,
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log_level=2 if args.verbose else 0
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)
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except Exception as exception:
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print(color("Unknown", "orange"))
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print(
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"got unknown exception run the command again with -v for more "
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"details"
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)
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print(exception)
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else:
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if result:
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print(color("True", "green"))
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else:
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print(color("False", "red"))
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if __name__ == "__main__":
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main()
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