RFC-5321
Simple Mail Transfer Protocol (SMTP)
Defines the protocol for sending email between mail servers. Specifies envelope addressing, mail routing via MX records, and relay/delivery procedures. The foundational protocol for all internet email transport.
- Document
- RFC 5321 (2008)
- URL
- https://www.rfc-editor.org/rfc/rfc5321
- Label
- Standard
- Keywords
- SMTP email mail transfer MX record mail relay mail delivery internet email
Domain: Network Protocols · Standard