emailed invoices

bbsbkb

I cc'd myself on the emailed invoices and I am not getting them, and I cannot verify if my customers are getting them.

UKR

Check your email account using your web browser and logon directly to the ISP's email website. See if these emails have been marked as Spam.
Also check the Spam folder in your PC's email software.
If you happen to have another email account, perhaps one at gmail, try that instead. Some ISPs are finicky about your From - email domain and just don't send out anything, not even failure messages.