{"draft":"","doc_id":"RFC1846","title":" SMTP 521 Reply Code ","authors":["A. Durand","F. Dupont"],"format":["ASCII","HTML"],"page_count":"4","pub_status":"EXPERIMENTAL","status":"EXPERIMENTAL","source":"Mail Extensions","abstract":"  ","pub_date":"August 1995","keywords":["simple","mail","transfer"],"obsoletes":[],"obsoleted_by":[],"updates":[],"updated_by":["RFC7504"],"see_also":[],"doi":"10.17487\/RFC1846","errata_url":null}