This field on the Misc tab of Customer Maintenance is only applicable if option 1012 "POS 2.0 Digital Receipts on System" is set to Y by an Epicor representative.
B = email PDF invoice and text detail
P = email PDF invoice only
T = email text detail only
R = email PDF receipt onl
S = email PDF receipt and text detail
N = do not email invoice
blank = depends on whether option 9783 "Ask cash/loyalty customers if they want receipts emailed?" is set to Yes. If Yes, blank means “Ask if they want emailed receipts (cash/loyalty customers).” If set to No, blank means "Do not e-mail, do not ask.”