In order to send an invoice by email, click on the E-mail option in the menu. 
This opens email invoice form containing fields:
- Message - message templates can be defined or changed in the settings.
To field is automatically filled with the partner email. If the email isn't defined for the partner it will be saved when first invoice is sent.
To send the invoice click on the [SEND] button or click on the [CANCEL] button to cancel sending the invoice.
Email status is available for the sent invoices. It's visible in the Invoices app in the additional columns. Email status can be:
- Not sent