Can i put a restriction on the distribution list Or can i allow few
users to access the distribution list ?

I really don't want all GroupWise use the distribution list to send
mails to all users.

Is there a way where i can specify who can send me mails ( Internal
Mails) ?

That is i want to put a restriction that except a few no one else
should send mails to the big boss in the company.

Thanks & Regards,