RFC 3206: The SYS and AUTH POP Response Codes

This memo proposes two response codes: SYS and AUTH, which enable clients to unambiguously determine an optimal response to an authentication failure. In…

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Incoming relationships (2 related RFCs)

Informatively referenced by — RFC 4422: Simple Authentication and Security Layer (SASL)
Informatively referenced by — RFC 5034: The Post Office Protocol (POP3) Simple Authentication and Security Layer (SASL) Authentication Mechanism