{"draft":"","doc_id":"RFC1427","title":" SMTP Service Extension for Message Size Declaration ","authors":["J. Klensin","N. Freed, Ed.","K. Moore"],"format":["ASCII","HTML"],"page_count":"8","pub_status":"PROPOSED STANDARD","status":"PROPOSED STANDARD","source":"Internet Mail Extensions","abstract":" 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]  ","pub_date":"January 1993","keywords":[" Mail "],"obsoletes":[],"obsoleted_by":["RFC1653"],"updates":[],"updated_by":[],"see_also":[],"doi":"10.17487\/RFC1427","errata_url":null}