View sent emails

I'm using my iCloud address to send emails through Akaunting. My protocols are set up correctly because I tested it by sending myself and invoice to a different email address. I rang Apple and they set it up for me by sharing my screen. I don't see a sent email appearing in my Apple Mail sent folder after I have sent the invoice in Akaunting. I understand that the email is sent from [email protected]. Apart from the invoice status and the notification that disappears when the invoice is sent. How can I view my sent emails in Akaunting or in my email client?