RFC 5322 outlines several key components for email messages, including:
1. Header Fields: These include fields such as From, To, Subject, Date, and Message-ID. Each field has specific syntax rules that must be followed. 2. Body: The body of the email contains the actual content and can be plain text or HTML. 3. MIME: Multipurpose Internet Mail Extensions (MIME) allows for the inclusion of multimedia content in emails. While MIME is defined in a separate RFC, RFC 5322 supports its implementation.