Problems with permissions and of owner of new files

[RAFAEL SEGOVIA VILCHEZ <dcasals @ infomail . lacaixa . es>]

Hallo all,
I have create for my studies (it is nothing commercial) a tool to share
information (messages, documents) by a group of people via web and via mail
(something similar to BSCW). I have used for the administration
(subcripcions,etc) and messages majordomo 1.94.4 modificating and adding
subrutines. 


Everything is installed in a linux machine

Everything has been working good till now that I have this problem:

When I use comands where majordomo has to create a file like writeconfig it
creates it as bin (or user:nobody in the case of being a request via web)
and permission 660 and I dont undestand why.

For exmaple:
rw-rw----   bin    bin     mylist.config.

Users can add documents  to the server and in this case majordomo creates
them in the same way:
 rw-rw---- bin bin mydoc.doc

So later they cannot see the document because neither nobody nor majordomo
belong to bin group.

I have tried to impose the owner and permission of the file adding in the
subrutines :
chmod and chown 
but it doesnt work.

So the question is : How can impose majordomo to create new files with
permission 666??

Could it be a problem of the  wrapper??? 

I really need to solve this problem because I have to explain my project
next week (OOPs).



I would appreciate any kind of suggerences.Thank you very much in advance.