RFC 2524 (rfc2524) - Page 2 of 83
Neda's Efficient Mail Submission and Delivery (EMSD) Protocol Specification Version 1
Alternative Format: Original Text Document
RFC 2524 EMSD February 1999
- Poorly defined gatewaying to and from Internet Mail
Because Internet Mail and EMSD have somewhat different and
conflicting service models and different data models, mapping
between them may provide good service only in limited cases, and
this may cause operational problems.
The IESG therefore recommends that EMSD deployment be limited to
narrow circumstances, i.e., only to communicate with devices that
have inherent limitations on the length and format of a message (no
more than a few hundred bytes of ASCII text), using either:
a. wireless links with adequate link-layer encryption and gatewayed
to the public Internet, or
b. a private IP network that is either very over-provisioned or has
some means of congestion control.
In the near future, the IESG may charter a working group to define an
Internet standards-track protocol for efficient transmission of
electronic mail messages, which will be highly compatible with
existing Internet mail protocols, and which wil be suitable for
operation over the global Internet, including both wireless and wired
links.
ABSTRACT
This document specifies the protocol and format encodings for
Efficient Mail Submission and Delivery (EMSD). EMSD is a messaging
protocol that is highly optimized for submission and delivery of
short Internet mail messages. EMSD is designed to be a companion to
existing Internet mail protocols.
This specification narrowly focuses on submission and delivery of
short mail messages with a clear emphasis on efficiency. EMSD is
designed specifically with wireless network (e.g., CDPD, Wireless-IP,
Mobile-IP) usage in mind. EMSD is designed to be a natural
enhancement to the mainstream of Internet mail protocols when
efficiency in mail submission and mail delivery are important. As
such, EMSD is anticipated to become an initial basis for convergence
of Internet Mail and IP-based Two-Way Paging.
The reliability requirement for message submission and message
delivery in EMSD are the same as existing email protocols. EMSD
protocol accomplishes reliable connectionless mail submission and
delivery services on top of Efficient Short Remote Operations (ESRO)
protocols as specified in RFC-2188 [1].
Banan Informational