- Title
- FMN Spiral 3.0 Informal Messaging Profile
- Description
- The Informal Messaging Profile provides standards and guidance for SMTP settings and the marking of informal messages.
Taxonomy
Standards
Guidance
Informal messages must be marked in the message header field Keywords (IETF RFC 2822) and firstline-of-text in the message body in accordance with the markings defined in the Security Policy in effect.
TLS with mutual authentication is mandatory for all SMTP communications. Detailed TLS protocol requirements are specified in the ‘Service Interface Profile for Transport Layer Security’.