- File formats:
- INTERNET STANDARD
- RFC 1653
- J. Klensin
- smtpext (app)
Discuss this RFC: Send questions or comments to firstname.lastname@example.org
This memo defines an extension to the SMTP service whereby an SMTP client and server may interact to give the server an opportunity to decline to accept a message (perhaps temporarily) based on the client's estimate of the message size. [STANDARDS-TRACK]
For the definition of Status, see RFC 2026.
For the definition of Stream, see RFC 8729.