How do I extract and save email attachments using Python's imaplib and email library?

After fetching an email with `M.fetch(num, '(RFC822)')`, convert the raw bytes to an `EmailMessage` object using `email.message_from_bytes(data[0][1])`. Then iterate over `msg.walk()` and check for `part.get('Content-Disposition')` to identify attachments. Retrieve the filename with `part.get_filename()` and save the content using `part.get_payload(decode=True)`. This technique is demonstrated in the Penetration Basics - Reading Emails Using the IMAP Protocol article and can be extended to search and export emails from Exchange servers as described in Penetration Basics - Searching and Exporting Emails from Exchange Servers.