Re: [exim] exim 4.63 / mailman 2.1 @ CENTOS 5]

I think we are talking at cross-purposes here....

Setting
    MTA = None
(or 'None') will stop mailman editing the alias file for new lists.

You will need to remove those alias file entries for the lists for
existing lists if you are still using the Exim mailman configuration
entries.

Cheers
    Nigel.