[Mailman-Users] initial hostname

[Mihamina Rakotomandimby (R12y)]

Hi,
I have a box named "phenom" on which I created a mailing list, beeeing 
root, via "newlist".

A while after that, I changed the hostname of the box to the current 
one:"lab.vectoris.fr" and changed the malman config too.

But now, when I look into the MTA/SMTP logs (Exim of my ISP, as 
smarthost), I see that an email is sent as root at phenom and is 
unrouteable by the MTA (obvious, he doesnt know about "phenom").

What should I hack into Mailman to get rid of that "@phenom" sending?