Roberto Gherardi wrote:

I have a problem whit the bounce.

I would like to know if I can redirect all messages bounce (managed by the engine internal mailman) of a particular news letter on a specific address e-mail

No. Not in Mailman. If you want to redirect or copy all bounces from a specific list to some given address, you may be able do that by manipulating the listname-bounces alias in the MTA.

If you are saying that you want to redirect all bounce notices that are generated by mail to a specific user from a specific list, I know of no easy way to do that.