I use quickbooks to creat the invoices for my company.
They have a really cool feature which let's me email invoices to my clients which saves time and money.
The problem occurs when my clients do not receive it.
I have no way of knowing until 30 days later when I don't get a check and they tell me it was not received.
It's not BS as I have sent and invoice to the same customer repeatedly and she has not received it.
But she receives my regular emails.
Any suggestions on what might be causing this? Or perhaps another program I coudl use that requires a return receipt?
IF this keeps up, I'll just use regular mail.
*****!

:fork_off: