{"draft":"draft-ietf-uta-mta-sts-21","doc_id":"RFC8461","title":"SMTP MTA Strict Transport Security (MTA-STS)","authors":["D. Margolis","M. Risher","B. Ramakrishnan","A. Brotman","J. Jones"],"format":["ASCII","HTML"],"page_count":"29","pub_status":"PROPOSED STANDARD","status":"PROPOSED STANDARD","source":"Using TLS in Applications","abstract":"SMTP MTA Strict Transport Security (MTA-STS) is a mechanism enabling\r\nmail service providers (SPs) to declare their ability to receive\r\nTransport Layer Security (TLS) secure SMTP connections and to specify\r\nwhether sending SMTP servers should refuse to deliver to MX hosts\r\nthat do not offer TLS with a trusted server certificate.","pub_date":"September 2018","keywords":["SMTP STARTTLS","Mail Security"],"obsoletes":[],"obsoleted_by":[],"updates":[],"updated_by":[],"see_also":[],"doi":"10.17487\/RFC8461","errata_url":"https:\/\/www.rfc-editor.org\/errata\/rfc8461"}