Happy to give you a demo of Stratabox, which includes push email but also keeps an archive on the site, as well as segregated access to Residents, Owners and SC members. You can also share admin privileges between several people, but once the initial setup is done, maintenance is minimal. We now have over 60 buildings using it and it has really helped them with engagement.
There is little sense in every single scheme reinventing the wheel on this when you can get purpose-built, enterprise grade software to do it for you.
Scale also enables us to innovate as well as ensuring maximum levels of security including encryption, intrusion detection and regular backups.