Re: [Exim] Callout

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Author: Matthew Byng-Maddick
Date:  
To: Exim-users
Subject: Re: [Exim] Callout
On Wed, Apr 30, 2003 at 02:47:19PM +0200, Nico Erfurth wrote:
> >Nico, at one time, was <> not required?
> I don't think so, maybe in the VERY early days (before I was born, or
> even could say SMTP ;))


<> has *always* been required, unless I'm misunderstanding you, as a method
for avoiding delivery loops.

RFC1123:
|       5.2.9  Command Syntax: RFC-821 Section 4.1.2

|
|          The syntax shown in RFC-821 for the MAIL FROM: command omits
|          the case of an empty path:  "MAIL FROM: <>" (see RFC-821 Page
|          15).  An empty reverse path MUST be supported.


RFC2821 doesn't say it explicitly, but the grammar in S4.1.1.2 implies
that it is a part of the spec, and S6.1 explicitly says that the
"notification MUST be sent using a null reverse path in the envelope."
To me, I think it's pretty clear that a server should support it to conform
to RFC2821 and RFC1123 (which is a clarification on RFC0821).

MBM

--
Matthew Byng-Maddick         <mbm@???>           http://colondot.net/