<?xml version='1.0'?>

<reference anchor='RFC1653'>

<front>
<title abbrev='SMTP Size Declaration'>SMTP Service Extension for Message Size Declaration</title>
<author initials='J.' surname='Klensin' fullname='John Klensin'>
<organization>MCI Data Services Division</organization>
<address>
<postal>
<street>2100 Reston Parkway</street>
<street>6th floor</street>
<city>Reston</city>
<region>VA</region>
<code>22091</code>
<country>US</country></postal>
<phone>+1 703 715 7361</phone>
<facsimile>+1 703 715 7435</facsimile>
<email>klensin@mci.net</email></address></author>
<author initials='N.' surname='Freed' fullname='Ned Freed'>
<organization>Innosoft International, Inc.</organization>
<address>
<postal>
<street>1050 East Garvey Avenue South</street>
<city>West Covina</city>
<region>CA</region>
<code>91790</code>
<country>US</country></postal>
<phone>+1 818 919 3600</phone>
<facsimile>+1 818 919 3614</facsimile>
<email>ned@innosoft.com</email></address></author>
<author initials='K.' surname='Moore' fullname='Keith Moore'>
<organization>University of Tennessee, Computer Science Dept</organization>
<address>
<postal>
<street>107 Ayres Hall</street>
<city>Knoxville</city>
<region>TN</region>
<code>37996-1301</code>
<country>US</country></postal>
<email>moore@cs.utk.edu</email></address></author>
<date month='July' year='1994' />
<abstract>
<t>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.</t></abstract></front>

<seriesInfo name='RFC' value='1653' />
</reference>
