{"draft":"","doc_id":"RFC2449","title":" POP3 Extension Mechanism ","authors":["R. Gellens","C. Newman","L. Lundblade"],"format":["ASCII","HTML"],"page_count":"19","pub_status":"PROPOSED STANDARD","status":"PROPOSED STANDARD","source":"Legacy","abstract":" This memo updates RFC 1939 to define a mechanism to announce support for optional commands, extensions, and unconditional server behavior. [STANDARDS-TRACK]  ","pub_date":"October 1998","keywords":["POP3-EXT","post office protocol","server","extension"],"obsoletes":[],"obsoleted_by":[],"updates":["RFC1939"],"updated_by":["RFC5034"],"see_also":[],"doi":"10.17487\/RFC2449","errata_url":null}