Specs from the email:
Apple iMac 21.5-inch 2.8GHz Quad-core i7 (Mid 2011) MC812LL/A-BTO
[Memory:8GB (4x2GB) [Included]]
[Storage:1TB Hard Drive [Included]]
[Graphics Card:AMD Radeon HD 6770M
And this
https://www.lifewire.com/buy-2011-imac-2260670"Apple claims the 2011 iMac supports at least 8 GB of RAM, and the 27-inch model configured with the i7 processor supports up to 16 GB of RAM. In actuality, testing performed by third-party RAM vendors shows that all models support up to 16 GB, and the
i7 up to 32 GB. The disparity is caused by the fact that Apple was limited to testing the 2011 iMac with 4 GB RAM modules, the largest size commonly available at the time. Eight GB modules are now available in the SO-DIMM configuration."
