[Mailman-Developers] Sender field

J C Lawrence claw@kanga.nu
Sun, 01 Apr 2001 14:54:43 -0700

On Sun, 01 Apr 2001 23:08:15 +0200 
Jesper Jensen <jj-list@mail.dk> wrote:

> Why is the 'sender' header field set to the list admin address?
> E.g.: Sender: mailman-developers-admin@python.org

I'd imagine its to better handle bounces from broken MTAs.

> I probably wouldn't have noticed if it wasn't because Outlook 2000
> (maybe other versions) shows this information as the 'from'
> address in the preview pane separator.  This is probably a flaw in
> Outlook...

Minimally it is Broken As Designed -- a characteristic we've all
beome very familiar with with Outlook.

> Anyway, back to my question, is Mailman doing this to conform with
> some rfc, or would it be safe to either remove the 'sender' header
> field og simply insert the "correct" 'from' address instead?

I'm not aware of an RFC mandate which covers this area.  That said
its worth realising that Sender is an unreliable header and may be
re-written by the first MTA (depends on how the message was

J C Lawrence                                       claw@kanga.nu
---------(*)                          http://www.kanga.nu/~claw/
--=| A man is as sane as he is dangerous to his environment |=--