[Answered ]-Change Django-Mezzanine-Cartridge From – email after placing order

You can add SHOP_ORDER_FROM_EMAIL in the settings.py

SHOP_ORDER_FROM_EMAIL = 'fromemail@example.com'

You can check detailed settings about cartridge at http://cartridge.jupo.org/configuration.html

And for BCC to admin add SHOP_ORDER_EMAIL_BCC in settings.py like below,

SHOP_ORDER_EMAIL_BCC = 'admin@example.com'