RFC5321 — Simple Mail Transfer Protocol
RFC5321: Simple Mail Transfer Protocol
IETF Request for Comments
| Status | DRAFT STANDARD |
| Publication status | DRAFT STANDARD |
| Published | October 2008 |
| Stream | IETF |
| Obsoletes | RFC2821 |
| Obsoleted by | — |
| Updated by | RFC7504 |
Abstract
This document is a specification of the basic protocol for Internet electronic mail transport. It consolidates, updates, and clarifies several previous documents, making all or parts of most of them obsolete. It covers the SMTP extension mechanisms and best practices for the contemporary Internet, but does not provide details about particular extensions. Although SMTP was designed as a mail transport and delivery protocol, this specification also contains information that is important to its use as a "mail submission" protocol for "split-UA" (User Agent) mail reading systems and mobile environments. [STANDARDS-TRACK]
Official sources
- Info page: https://www.rfc-editor.org/info/rfc5321
- Full text: https://www.rfc-editor.org/rfc/rfc5321.txt
- HTML: https://www.rfc-editor.org/rfc/rfc5321.html
Abstract and metadata are reproduced from the public RFC index; the full text is linked, not copied.