Originally Posted by till
In the meantime we checked this, sending works fine, so there is no bug in that function. Maybe you dont have the recipient email address not set which is the comapny email address.
Hmm, I don't know how it's possible, but for a new one customer sending emails work, but for another one still not work... ok it does not matter
Of course as you said "Offer in shop" solved my problem with addons and upgrades.
Btw. When will be available a new manual for billing module?