Re: (gnus-inews-domain-name); insertion of Sender:

[Sten Drescher <stend@grendel.texas.net>]

Per Abrahamsen <abraham@dina.kvl.dk> said:

>>>>>> "PP" == Per Persson <pp@pfawww.pp.se> writes:
PP> So using a half-hearted/intelligent authentication method which
PP> might return bogus values is better then letting the user make sure
PP> that the value returned is correct? Thanks for clearing things out
PP> for me.

PA> A value provided by the user is per definition wrong for the Sender:
PA> field.  The Sender: field is not expected to reflect the users mail
PA> address.  That would have been really stupid, as we already have the
PA> From: field for that.

	Incorrect.  It _must_ reflect the users mail address if it is
present:

rfc822> 4.1.  SYNTAX

[...]

rfc822> authentic   =   "From"       ":"   mailbox  ; Single author
rfc822>             / ( "Sender"     ":"   mailbox  ; Actual submittor
rfc822>                 "From"       ":" 1#mailbox) ; Multiple authors
rfc822>                                             ;  or not sender

[...]

rfc822> 4.4.2.  SENDER / RESENT-SENDER

rfc822> This field contains the authenticated identity of the AGENT
rfc822> (person, system or process) that sends the message.  It is
rfc822> intended for use when the sender is not the author of the mes-
rfc822> sage, or to indicate who among a group of authors actually sent
rfc822> the message.  If the contents of the "Sender" field would be
rfc822> completely redundant with the "From" field, then the "Sender"
rfc822> field need not be present and its use is discouraged (though
rfc822> still legal).  In particular, the "Sender" field MUST be present
rfc822> if it is NOT the same as the "From" Field.

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