doubling addresses when following up

doubling addresses when following up

[Vladimir Volovich]

Hi,

suppose that some message has headers
To: someone@domain.com
Reply-To: SomeOne@domain.com

When i followup to this message, gnus puts both addresses (one to To:,
and one to Cc:). But these addresses differ only by case. Do RFCs say
that email addresses are case-insensitive? If so, then gnus should
ignore duplicated emails which differ only by case.

	Best regards, -- Vladimir.

Re: doubling addresses when following up

[Shaun Lipscombe]

* "Vladimir" == Vladimir Volovich <vvv@vvv.vsu.ru> writes:

 Vladimir> Hi, suppose that some message has headers To:
 Vladimir> someone@domain.com Reply-To: SomeOne@domain.com

 Vladimir> When i followup to this message, gnus puts both addresses
 Vladimir> (one to To:, and one to Cc:). But these addresses differ
 Vladimir> only by case. Do RFCs say that email addresses are
 Vladimir> case-insensitive? If so, then gnus should ignore duplicated
 Vladimir> emails which differ only by case.

This is what a wide reply `S f' or just `f' does.

-------------
C-h d gnus-summary-wide-reply RET

gnus-summary-wide-reply is an interactive compiled Lisp function in `gnus-msg'.
(gnus-summary-wide-reply &optional YANK)

Start composing a wide reply mail to the current message.
If prefix argument YANK is non-nil, the original article is yanked
automatically.
-------------

A wide reply will include all email addresses that where in the email
you are replying to.  If there is a reply-to, then this is included in
the Cc: list even if its identical.  It shouldn't be identical as it
then serves no purpose, and that person will receive an extra copy
because of this.

HTH,

Shaun

-- 
          (o_
(o_  (o_  //\
(/)_ (/)_ V_/_   shaun.lipscombe@gasops.co.uk

Re: doubling addresses when following up

[Toby Speight]

Vladimir> Vladimir V. Volovich <URL:mailto:vvv@vvv.vsu.ru>

0> In article <m34sece457.fsf@vvv.vsu.ru>, Vladimir wrote:

Vladimir> suppose that some message has headers
Vladimir> To: someone@domain.com
Vladimir> Reply-To: SomeOne@domain.com
Vladimir>
Vladimir> When i followup to this message, gnus puts both addresses (one
Vladimir> to To:, and one to Cc:).  But these addresses differ only by
Vladimir> case.  Do RFCs say that email addresses are case-insensitive?

The local-part of an address is case-sensitive as far as transmission is
concerned (though the two addresses may be delivered to the same mailbox,
a mail agent must assume they are as different as <some-one@example.com>
and <some.one@example.com>).  In a past life, I once used this for
filtering mail based on which case variant it was addressed to (with
case-insensitive delivery, and no "plussing" facility).

The domain-name, though, is case-insensitive, so <some-one@example.com>
and <some-one@Example.COM> refer to the same mailbox.

The relevant RFC is RFC 822 <URL:http://www.ietf.org/rfc/rfc0822.txt>,
which says:

#>      3.4.7.  CASE INDEPENDENCE
#>
#>         Except as noted, alphabetic strings may be represented in  any
#>         combination of upper and lower case.  The only syntactic units
#>         which requires preservation of case information are:
#>
#>                     -  text
#>                     -  qtext
#>                     -  dtext
#>                     -  ctext
#>                     -  quoted-pair
#>                     -  local-part, except "Postmaster"
#>
#>         When matching any other syntactic unit, case is to be ignored.
#>         For  example, the field-names "From", "FROM", "from", and even
#>         "FroM" are semantically equal and should all be treated ident-
#>         ically.
#>
#>         When generating these units, any mix of upper and  lower  case
#>         alphabetic  characters  may  be  used.  The case shown in this
#>         specification is suggested for message-creating processes.
#>
#>         Note:  The reserved local-part address unit, "Postmaster",  is
#>                an  exception.   When  the  value "Postmaster" is being
#>                interpreted, it must be  accepted  in  any  mixture  of
#>                case, including "POSTMASTER", and "postmaster".

Re: doubling addresses when following up

[Justin Sheehy]

Vladimir Volovich <vvv@vvv.vsu.ru> writes:

> To: someone@domain.com
> Reply-To: SomeOne@domain.com

Those are probably the same in reality, but could legally be different
addresses.

> When i followup to this message, gnus puts both addresses (one to To:,
> and one to Cc:). But these addresses differ only by case. Do RFCs say
> that email addresses are case-insensitive? If so, then gnus should
> ignore duplicated emails which differ only by case.

Gnus is acting correctly, as it cannot know that those are
equivalent.  If they are equivalent, then the originator of the
message should not have put that Reply-To header in.

-Justin