RFC 2524 (rfc2524) - Page 2 of 83

Neda's Efficient Mail Submission and Delivery (EMSD) Protocol Specification Version 1

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