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The description and use case discuss the need for TLS compatibility with MS Exchange, and the requirement for a second EHLO. That capability was delivered in z/OS V2R3 (and on V2R1 and V2R2 via APAR PI56614). Therefore, this RFE is being marked as delivered. One of the comments discusses the provision of the AUTH command. That is not delivered with this RFE, but is a known requirement that would be addressed by RFE 28169 "CSSMTP Suppport for SASL Methods PLAIN and KERBEROS", if implemented. Please consider voting for that RFE if interested in AUTH command support.
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PI56614
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PI56614
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PI56614
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PI56614
Due to processing by IBM, this request was reassigned to have the following updated attributes:
Brand - Servers and Systems Software
Product family - z Systems Software
Product - z/OS Communications Server
For recording keeping, the previous attributes were:
Brand - WebSphere
Product family - Enterprise Networking
Product - z/OS Communications Server
Would like to have the additional functionality as specified in RFC4954. The ability to send the AUTH xxxx command. See below,
SMTP AUTH can be used also on port 25. Usually, servers reject RCPT TO commands that imply relaying unless authentication credentials have been accepted. The specification recommends that servers issue 530 5.7.0 Authentication required in response to most commands in case the server is configured to require authentication and the client hasn't done it yet. Only servers listening on port 587, or private servers, should be configured that way, not a Message eXchange (MX). However, the historical trait that SMTP is not authenticated by default results in a different behavior with regard to access protocols, in some cases; for example, when using AUTH EXTERNAL after STARTTLS.[9]
Besides the AUTH command, the extension also provides for an AUTH parameter to the MAIL FROM command, so as to allow to distinguish authentication from authorization. That way, a sender can identify itself and transmit several messages during the same session. While the authentication doesn't need to vary, once established, different messages may be sent according to different agreements and hence require different authorization. For example, messages may be relayed on behalf of different users. Use of this parameter is much less popular than using the command to grant relay privileges.
When using authentication, EHLO should be used for the greeting to indicate that Extended SMTP is in use, as opposed to the HELO greeting in standard SMTP.