import email

def get_message_id(raw_email):
    """
    Extract the Message-ID header from a raw RFC822 email.
    """
    msg = email.message_from_string(raw_email)
    return msg.get("Message-ID")

import time
import uuid

def generate_message_id(domain="bocpress.co.uk"):
    """
    Generates a unique RFC 2822 Message-ID.
    Format: <timestamp.uuid@domain>
    """
    timestamp = int(time.time() * 1000)  # milliseconds
    unique_id = uuid.uuid4().hex
    return f"<{timestamp}.{unique_id}@{domain}>"