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Re: [Nmh-workers] modernizing smtp message submission

From: Alexander Zangerl
Subject: Re: [Nmh-workers] modernizing smtp message submission
Date: Fri, 04 Jul 2014 15:37:04 +1000

On Thu, 03 Jul 2014 21:44:38 -0700, Lyndon Nerenberg writes:
>> I didn't think that 587 requires AUTH;
>It does. That's its entire point.  (Read the RFC.)

that's not quite correct.


4.3.  Require Authentication

   The MSA MUST, by default, issue an error response to the MAIL command
   if the session has not been authenticated using [SMTP-AUTH], unless
   it has already independently established authentication or
   authorization (such as being within a protected subnetwork).

so, accepting mail on 587 from localhost without smtp auth is fine,
localhost being classifiable as 'protected subnetwork'.

sendmail allows that automatically, for example.


Alexander Zangerl + GPG Key 0xB963BD5F (or 0x42BD645D) + http://snafu.priv.at/
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