[Mailman-Users] mailman & Postix

[Denis]

Hi,

I have a problem with Mailman and postfix.

When i send a message to a adresslist, i have a mail of Postfix who say:
"This is the Postfix program at host xxxx

I'm sorry to have to inform you that the message returned
below could not be delivered to one or more destinations."

...

Someone can explain what i have to do or send me a link to documentation
?

Thanks 
Denis