Question : Increase group size in lotus notes

What we need to do is send out company communiques to the corporate retail staff located nationwide in Lotus Notes.  This involves annual correspondence to 150 ? 500 users annually.  

As you can imagine, this becomes labor intensive when the group limit is 20 users per group.  Is there a way to increase the group size or alternative suggestion?  

Answer : Increase group size in lotus notes

As far as I know a group can have around 250 entries (names). It is a known memoryblock limitation of the field