Procmail rule needed to prevent duplicate list mails?

[Amedee @ Ubuntu]

On Fri, July 24, 2009 13:46, Steve Flynn wrote:
> On Fri, Jul 24, 2009 at 12:22 PM, Amedee @
> Ubuntu<amedee-ubuntu at amedee.be> wrote:
>
>> I got this email twice.
>
> I had thought that I had mistakenly hit Reply All in gmail.
>
> Turns out that hitting reply directs mail to both you and the list.
> However, if I pick someone else at random (say Liam Proven) hitting
> reply directs mail only to the list.
>
> The headers indeed show:
>
> Reply-To: amedee at vangasse.eu, "Ubuntu user technical support,	not for
> general discussions" <ubuntu-users at lists.ubuntu.com>

Aha! Thank you Steve.
It could be a Squirrelmail configuration cockup.
Should be better now. Thanks again for four feedback!

Amedee