# RFC 5322 - Internet Message Format

**Canonical:** https://apis.io/apis/smtp/rfc5322/  
**Provider:** SMTP — https://apis.io/providers/smtp/  
**Documentation:** https://datatracker.ietf.org/doc/html/rfc5322

RFC 5322 - Internet Message Format is one of 2 APIs that [SMTP](https://apis.io/providers/smtp/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Email Format, RFC, IETF, Message Headers, and Standards.

RFC 5322 defines the format of electronic mail messages transmitted via SMTP. It specifies the syntax for message headers (From, To, Subject, Date, etc.) and body structure. Works in conjunction with RFC 5321.

## Machine-readable artifacts (1)

- **Specification** — https://datatracker.ietf.org/doc/html/rfc5322

## Other SMTP APIs (1)

- [RFC 5321 - Simple Mail Transfer Protocol](https://apis.io/apis/smtp/rfc5321/)

## Tags

Email Format, RFC, IETF, Message Headers, Standards

---

Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/smtp/rfc5322/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/smtp/.