Any MAIL MANager (Generic Software Inc.) users out there?

We're using MAIL MANager (Rel 2.50) and are having a problem when new users
are added to the system.  User message queues are created with a default
*PUBLIC authority of *USE.  When another user sends email to a new user with
this authority, MailMan chokes on this with CPF2408 / CPF2469 (Not
authorized to message queue USERNAME).

To get around this, we have been changing everyone's user MsgQ so that
*PUBLIC has *CHANGE authority.  (Today was the first time I was made aware
of this.)  Why does MM need this authority?  I'm not comfortable with
someone being able to delete messages from my user message queue, which I
would imaging *CHANGE would allow.

I emailed Generic Software's tech support earlier today, and haven't had a
response.  I see that they're merging with another company.  Does anyone
know if support has suffered for it?

tia,
db