Send an invoice by email

Finalize the invoice first. Only a finalized invoice with its PDF stored can be sent.
Open the invoice. In the Sending section choose Send by email.
Check Recipients: one or more email addresses separated by commas, at most 10. Add CC or BCC if you want, and tick the box to get a copy yourself.
Adjust Subject and Message. The text comes ready-made in the language of the invoice. The attached files are listed below the message.
Choose Send now. The mail is queued and the list below the form shows each send with its status, such as Waiting to send, Sent or Undeliverable.
If the client has no contact email in the settings, the app warns you that the customer's replies reach nobody. Add it there first.
If a send shows that it was interrupted and it is unclear whether the mail arrived, check with the customer before you send again.