3/4/2023 0 Comments Authenticator extension![]() ![]() Response argument is omitted and the chosen mechanism requiresĪn initial client response, the server MUST proceed as defined Used to save a round-trip when using authentication mechanisms The optional initial response argument to the AUTH command is If the server receives such a response, it MUST reject the If the client wishes to cancel theĪuthentication exchange, it issues a line with a single "*". This challenge MUST NOT contain any text otherĪ client response consists of a line containing a Įncoded string. Server challenges and client responses that are specific toĪ server challenge is sent as a 334 reply with the text partĬontaining the encoded string supplied by the SASL The SASL authentication exchange consists of a series of extension, it SHOULD return a 5.5.4 enhanced Supported or requires an encryption layer), the server rejects Requested authentication mechanism is invalid (e.g., is not Subsequent protocol interactions during this session. Optionally, it also negotiates a security layer for Mechanism, it performs the SASL exchange to authenticate the If the server supports the requested authentication SASL mechanism to use with the first parameter of the AUTHĬommand. The AUTH command initiates a authentication exchangeīetween the client and the server. The AUTH command is not permitted during a mail transaction.Īn AUTH command issued during a mail transaction MUST be Successful AUTH command completes, a server MUST reject any Present, this response MUST be encoded as described in Section 4 of or contain a single character "=".Īfter an AUTH command has been successfully completed, no moreĪUTH commands may be issued in the same session. Initial-response: An optional initial client response. Mechanism: A string identifying a authentication This extension is appropriate for the submission protocol MAIL FROM command, and extends the maximum line length of theĦ. An optional parameter using the keyword "AUTH" is added to the The list ofĪvailable mechanisms MAY change after a successful STARTTLSĥ. List of the names of available mechanisms. The AUTH EHLO keyword contains as a parameter a space-separated The EHLO keyword value associated with this extension is "AUTH".ģ. The name of this service extension is "Authentication".Ģ. RFC 4954 SMTP Service Extension for Authentication July 2007 3. In examples, "C:" and "S:" indicate lines sent by the client and "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in thisĭocument are to be interpreted as described in. The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", Header field, and clarifies interaction with SMTP PIPELINING Recommends use of RFC 3848 transmission types in the Received trace Support SASLprep profile for preparing authorization identities, Response code, adds a new Enhanced Status Code, adds a requirement to When compared to RFC 2554, this document deprecates use of the 538 This extension includes a profile of the Simple Authentication and Submitted the message to the mail delivery system. Optionally specify a mailbox associated with the identity that ![]() Interactions during this session and, during a mail transaction, Optionally negotiate a security layer for subsequent protocol Additional Requirements When Using SASL PLAIN over TLS. The AUTH Parameter to the MAIL FROM command. RFC 4954 SMTP Service Extension for Authentication July 2007ġ. Of the Simple Authentication and Security Layer (SASL) for SMTP. ![]() Mechanism to the server, perform an authentication protocol exchange,Īnd optionally negotiate a security layer for subsequent protocol This document defines a Simple Mail Transport Protocol (SMTP)Įxtension whereby an SMTP client may indicate an authentication Official Protocol Standards" (STD 1) for the standardization stateĪnd status of this protocol. Please refer to the current edition of the "Internet Internet community, and requests discussion and suggestions for This document specifies an Internet standards track protocol for the SMTP Service Extension for Authentication Updated by: 5248 Errata Exist Network Working Group R. RFC 4954: SMTP Service Extension for Authentication ![]()
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