Good afternoon QB team,

I am also experiencing the same issue. I've tried editing the saved contact details (deleting, saving, editing and re-entering email addresses I've double checked) and resending and nothing is working. Completely randomly some invoices get through, others bounce. Sometimes to the same client one will get through and another will have the delivery issue. I've followed all the recommended steps. I am not cc'ing or bcc'ing anyone on these either.

Please, there needs to be a resolution to this as the only way to check is to physically review all invoices you send and then I have to edit to download the invoice and manually send explaining the situation and it is getting extremely tedious. I only discovered the issue when I realised a key client has a load of overdue invoices that were unpaid which is totally out of character - this issue can seriously affect a company's cash flow! 

Please help urgently. Thank you in advance.