[Mailman-Users] Sender modification
r.barrett at openinfo.co.uk
Wed May 12 08:18:00 CEST 2004
On 12 May 2004, at 02:48, Lloyd F. Tennison wrote:
> I'm going to ask why it is there at all?
Look under head "3.6.2. Originator fields" of RFC 2822. The relevant
The "Sender:" field specifies the
mailbox of the agent responsible for the actual transmission of the
message. For example, if a secretary were to send a message for
another person, the mailbox of the secretary would appear in the
"Sender:" field and the mailbox of the actual author would appear in
the "From:" field. If the originator of the message can be indicated
by a single mailbox and the author and transmitter are identical, the
"Sender:" field SHOULD NOT be used. Otherwise, both fields SHOULD
View Mailman as being the secretary distributing a message for the
actual message originator. Mailman is never the true originator of a
posted message it is normally distributing.
In the usual circumstance, the the originator's address goes in the
From: and the listname-bounces address (or listname address with the
hack suggested) _should_ go in the Sender: in order to be RFC
> I just checked over 50 messages
> and the only ones I have with the Sender and the Errors headers are
> those from Mailman. If there are to be RFC compliant - why does no
> one else have them? (Errors I am guessing are for Mailman - but since
> it does not read that line...)
> (Even my tech bulletins from Microsoft, Apple and Symantec do not
> have them.)
No comment about selected originators or methodology. What are you
trying to prove; no do not answer that I was just being rhetorical.
> From: Richard Barrett <r.barrett at openinfo.co.uk>
> Subject: Re: [Mailman-Users] Sender modification
> Date sent: Tue, 11 May 2004 17:17:23 +0100
> To: cgross at 2blc.com
> Copies to: Mailman-Users at python.org
>> Right near the end of
>> you will find details of a hack to the MM source code for MM 2.1.x
>> which changes the Sender: header value from listname-bounces to
>> listname, while leaving the envelope sender as listname-bounces for
>> bounce handling. The line number referenced in the FAQ is approximate;
>> depending on what exact version of MM 2.1.x source you are running you
>> may find the line to be changed a few either way of the one
>> This is an attempt to alleviate the pain that some users (and list
>> admins) appear to experience with the conflation of From: and Sender:
>> headers in the displayed From field of the web GUI of some versions of
>> some Microsoft MUAs. If that is your problem, this hack might help.
>> With well behaved MTAs that send bounce messages back to the envelope
>> sender this change should be safe but if it blows up in your face
>> because a badly behaved MTA sends a bounce back to the Sender header,
>> which is now the primary list address, and hence to the list itself,
>> is on your head; you have been warned.
>> That said, the change is one-line-simple and easy to reverse if things
>> start to go pear shaped.
>> On 11 May 2004, at 16:17, Brad Knowles wrote:
>>> At 4:54 PM +0200 2004/05/11, cedric gross wrote:
>>>> Is there a way to change the sender of mail (i.e.
>>>> mailman-user-bounce) with
>>>> something more humain like : The Mailman User list
>>>> <mailman-users at python.org) ?
>>> You can go throughout the Mailman code and change listname-bounces
>>> whatever you want, but this is not recommended.
>>> Bounces will actually come back to this address, so whatever you do,
>>> you have to be able to distinguish between bounces and original
>>> submissions. But if you had a violent opposition to the string
>>> "-bounces" appearing anywhere, you could change this to be "-fred" or
>>> whatever else you may want.
>>>> Or must I do it by canonical rewriting ?
>>> That would be an extremely bad idea. You would be destroying vital
>>> information encoded in the envelope sender address, which could not
>>> recovered once a bounce occurred.
>>> See Mailman FAQ 2.2 at
>>> and FAW 2.3 at
>>> Brad Knowles, <brad.knowles at skynet.be>
>>> "They that can give up essential liberty to obtain a little temporary
>>> safety deserve neither liberty nor safety."
>>> -Benjamin Franklin, Historical Review of Pennsylvania.
>>> SAGE member since 1995. See <http://www.sage.org/> for more info.
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