Where could I look for a problem if, for example, I get a notification that the invoice has been sent.
The client (gmail email or domain email) does not receive this email.
Maybe just thinking about two different hosting.
Ninja invoices is on Cpanel - hosting (dns zone edit from there)
Email: hosting from another email hosting provider
I can not find any log report that email was sent from email [email protected]
Your suggestion was ok. If I put in the test client email that was installed and this was used for test client I recivied two emails. One email from Ninja system(notification) and second like a client with attachment.
But If I use a other emails like gmail, other domain emails → all other email can not recivied a client notification.