RFC9422: The LIMITS SMTP Service Extension
Internet Engineering Task Force (IETF) N. Freed Request for Comments: 9422 Category: Standards Track J. Klensin ISSN: 2070-1721 February 2024 ...
RFC1870: SMTP Service Extension for Message Size Declaration
Network Working Group J. Klensin, WG Chair Request For Comments: 1870 MCI STD: 10 N. Freed, Editor Obsoletes: 1653 Innosoft International, Inc. Ca...
RFC2852: Deliver By SMTP Service Extension
Network Working Group D. Newman Request for Comments: 2852 Sun Microsystems Updates: 1894 June 2000 Category: Standards Track Deliver By SMTP Service E...