How to avoid resent- headers?

How to avoid resent- headers?

[Steinar Bang]

How do I avoid the resent-from etc. headers in resent messages?

I tried doing this, but it didn't help:

(setq message-ignored-resent-headers
      (concat message-ignored-resent-headers
	      "\\|^Resent-.+"))

Thanx!


- Steinar

Re: How to avoid resent- headers?

[Kai Grossjohann]

Steinar Bang <sb@dod.no> writes:

> How do I avoid the resent-from etc. headers in resent messages?

This is like asking how to avoid From/To/Cc in normal messages ;-)

Kai

Re: How to avoid resent- headers?

[Steinar Bang]

>>>>> Kai Grossjohann <kai@emptydomain.de>:

> Steinar Bang <sb@dod.no> writes:
>> How do I avoid the resent-from etc. headers in resent messages?

> This is like asking how to avoid From/To/Cc in normal messages ;-)

How so?  Are these headers understood, and used by the MTA?  I thought
perhaps Gnus did an SMTP connection when resending?

Perhaps I can convince exim to lose these headers then?

Re: How to avoid resent- headers?

[Jesper Harder]

Steinar Bang <sb@dod.no> writes:

>>>>>> Kai Grossjohann <kai@emptydomain.de>:
>
>> Steinar Bang <sb@dod.no> writes:
>>> How do I avoid the resent-from etc. headers in resent messages?
>
>> This is like asking how to avoid From/To/Cc in normal messages ;-)
>
> How so?  Are these headers understood, and used by the MTA?

No, they're informational (but so is From/To/Cc).  RFC 2822 says that
they SHOULD be added when resending.

Re: How to avoid resent- headers?

[Katsumi Yamaoka]

>>>>> In <7cd69fiipf.fsf@nature.tsukuba.ac.jp> Hiroshi Fujishima wrote:

> Steinar Bang <sb@dod.no> writes:

>> How do I avoid the resent-from etc. headers in resent messages?

> (defvar message-ignored-mail-headers-save message-ignored-mail-headers)
> (setq message-ignored-mail-headers
>       (concat message-ignored-mail-headers-save
>   	      "\\|^Resent-From:"))

Even if it is successful to remove Reset- headers (but I don't
think so), is the message sent to the correct Resent-To address?
Of course there's no problem if To and Resent-To are the same,
though.
-- 
Katsumi Yamaoka <yamaoka@jpl.org>

Re: How to avoid resent- headers?

[Steinar Bang]

>>>>> Jesper Harder <harder@ifa.au.dk>:

> Steinar Bang <sb@dod.no> writes:
>>>>>>> Kai Grossjohann <kai@emptydomain.de>:

>>> Steinar Bang <sb@dod.no> writes:
>>>> How do I avoid the resent-from etc. headers in resent messages?

>>> This is like asking how to avoid From/To/Cc in normal messages ;-)

>> How so?  Are these headers understood, and used by the MTA?

> No, they're informational

What program is it that interprets them to see where the message
should go?  The MTA?  The MTA interface in Emacs?  Something in Gnus?

> (but so is From/To/Cc).

...except for when being initially interpreted by the MTA on
linux/unix systems.

Re: How to avoid resent- headers?

[Steinar Bang]

>>>>> Katsumi Yamaoka <yamaoka@jpl.org>:

> Even if it is successful to remove Reset- headers (but I don't think
> so), is the message sent to the correct Resent-To address?  Of
> course there's no problem if To and Resent-To are the same, though.

Well, most of the times I resend, it is because the original address
bounced, so that won't do.

On the other hand, the only header I need to sap is resent-from,
because it didn't pick a sender address using gnus-posting-styles, but
instead created a bogus sender address using my current userid at
gnus-local-domain. 

So the exact example above, should work for me.

Re: How to avoid resent- headers?

[Steinar Bang]

>>>>> Hiroshi Fujishima <pooh@nature.tsukuba.ac.jp>:

> Steinar Bang <sb@dod.no> writes:
>> How do I avoid the resent-from etc. headers in resent messages?

> (defvar message-ignored-mail-headers-save message-ignored-mail-headers)
> (setq message-ignored-mail-headers
>       (concat message-ignored-mail-headers-save
>   	      "\\|^Resent-From:"))

Hm... what's the significant difference from my original example?  Not
the temporary variable?  Is it that this blocks just a single resent-
header, instead of trying to match all of them?  Is it that the colon
is part of the regexp pattern?

Thanx!

Re: How to avoid resent- headers?

[Kai Grossjohann]

Steinar Bang <sb@dod.no> writes:

>>>>>> Kai Grossjohann <kai@emptydomain.de>:
>
>> Steinar Bang <sb@dod.no> writes:
>>> How do I avoid the resent-from etc. headers in resent messages?
>
>> This is like asking how to avoid From/To/Cc in normal messages ;-)
>
> How so?  Are these headers understood, and used by the MTA?

If you pass the message to "sendmail -t", then sendmail will look
whether the resent-foo headers exist and use that.  Only if resent-foo
does not exist, then sendmail will look at the foo header.

Search for "Resent-" in smtpmail.el for further information.

Kai

Re: How to avoid resent- headers?

[Josh Huber]

Steinar Bang <sb@dod.no> writes:

> What program is it that interprets them to see where the message
> should go?  The MTA?  The MTA interface in Emacs?  Something in Gnus?

[...]

> ...except for when being initially interpreted by the MTA on
> linux/unix systems.

The MTA does not look at the To/CC headers when deciding where to
deliver a message, it uses the envelope recipient information.  What
happens (at lest, when you're using smtpmail.el) is the envelope
recipient information is gathered from the various fields
(to/cc/bcc), bcc headers are removed, then the message is injected
into the MTA using SMTP.  The initial protocol exchange (prior to
sending the message data) specifies the sender/recipient addresses.

-- 
Josh Huber

Re: How to avoid resent- headers?

[Steinar Bang]

>>>>> Josh Huber <huber+news@alum.wpi.edu>:

> The MTA does not look at the To/CC headers when deciding where to
> deliver a message, it uses the envelope recipient information. 

Yes I know.  This is true for sending mail with SMTP.

I was thinking of what sendmail.el used to do: call sendmail and hand
over the body of the message.  I don't know if it works that way
anymore (smtpmail.el, which you refer to, presumably talks SMTP to
hand over the message).

However, I'm still in the blue as to what software _uses_ the resent-*
headers.

Re: How to avoid resent- headers?

[Steinar Bang]

>>>>> Kai Grossjohann <kai@emptydomain.de>:

> If you pass the message to "sendmail -t", then sendmail will look
> whether the resent-foo headers exist and use that.  Only if
> resent-foo does not exist, then sendmail will look at the foo
> header.

OK.  It's used by sendmail to do the actual resend?

> Search for "Resent-" in smtpmail.el for further information.

Do you mean in sendmail.el?  smtpmail.el presumably speaks SMTP to
hand off the message, and doesn't need the message to have resent-
headers, at least not when sending it off.

Re: How to avoid resent- headers?

[Jochen Küpper]

On Tue, 20 Jan 2004 07:20:20 +0100 Steinar Bang wrote:

Steinar> Well, most of the times I resend, it is because the original
Steinar> address bounced, so that won't do.

What's about "S D b" (C-h d gnus-summary-resend-bounced-mail)?

Greetings,
Jochen
-- 
Einigkeit und Recht und Freiheit                http://www.Jochen-Kuepper.de
    Liberté, Égalité, Fraternité                GnuPG key: CC1B0B4D
        (Part 3 you find in my messages before fall 2003.)

Re: How to avoid resent- headers?

[Kai Grossjohann]

Steinar Bang <sb@dod.no> writes:

>>>>>> Kai Grossjohann <kai@emptydomain.de>:
>
>> If you pass the message to "sendmail -t", then sendmail will look
>> whether the resent-foo headers exist and use that.  Only if
>> resent-foo does not exist, then sendmail will look at the foo
>> header.
>
> OK.  It's used by sendmail to do the actual resend?

I guess that sendmail.el feeds the message to "/usr/lib/sendmail -t" without
further ado.  /usr/lib/sendmail is then responsible for looking at the
Resent- headers.

>> Search for "Resent-" in smtpmail.el for further information.
>
> Do you mean in sendmail.el?

No.

> smtpmail.el presumably speaks SMTP to hand off the message, and
> doesn't need the message to have resent- headers, at least not when
> sending it off.

smtpmail.el computes the envelope from the resent- headers.

Kai