One of our reunion classes this year chose to designate their class gift to Sustainability. This email appeal was specific to their class, we personalized the header to include their yearbook photos, invitations to on-campus events relating to their class gift, and a link to register for their reunion.  For some additional motivation, one of the reunion committee members sponsored a swag bag for a drawing that all donors were entered into, and the other committee member set up a $5,000 match for gifts designated to sustainability.