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2.2.1.4 SMTP_AUTH_Fail_Response Message

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SMTP_AUTH_Fail_Response is defined as follows. This message, identified by the 535 status code, is defined in [RFC2554] section 4, and indicates that the authentication has terminated unsuccessfully because the user name or password is incorrect.

  535 5.7.3 <human-readable-string><CR><LF>