Hello,
We would need more details about your email settings and what "bcc plugin" you're talking about.
Also, some details about how the payment are confirmed would help us to understand the workflow since some payment plugin could not trigger the customer email notification.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.