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zabszk / CSharp-SMTP-Server

SMTP Server in C#
MIT License
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Auth LOGIN: Error #12

Closed frankyjquintero closed 2 months ago

frankyjquintero commented 9 months ago

LOGIN authentication must be set in some scenarios the login argument sends user at the same time

https://github.com/zabszk/CSharp-SMTP-Server/blob/c23f9adae7859ab7aa310b0973d6d222e7a77219/CSharp-SMTP-Server/Protocol/Commands/AuthenticationCommands.cs#L25-L38

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zabszk commented 2 months ago

Hi,

Sorry for a very delayed response. AUTH LOGIN is defined by this document: https://www.ietf.org/archive/id/draft-murchison-sasl-login-00.txt (in general this method is obsolete and was never an official standard: https://www.iana.org/assignments/sasl-mechanisms/sasl-mechanisms.xhtml).

The standard doesn't define a possibility to send username in the same line as AUTH LOGIN command. In general AUTH PLAIN should be used instead - it's the recommended (not obsolete) method and it supports passing username and password as an argument.