Receive invoices by email

Open Settings, then the Mail intake tab. Only the firm owner and admins can set it up.
Choose Create address. Each client gets one address. A signing secret (a long key that proves the mail really comes from your mail provider, the service that delivers incoming mail) appears only this once: store it with the provider, then choose Hide.
Under Allowed senders type the email address of each person who may send invoices and choose Allow. Until you do, every mail is rejected.
Tick Mail intake active for this client.
Forward invoices to the address shown under Address. PDF, image and XRechnung attachments become receipts; the mail text is never read. No address is shown until a mail provider is configured for the app (that is set up by whoever runs the installation, not in this tab); until then only the path the provider delivers to (the webhook) exists.
The table Received mails shows each mail with its Result, for example Receipts created, Sender not allowed or Already archived.
An allowed sender gets a short reply mail saying what arrived: receipts created, already archived, or why nothing could be taken. A sender who is not allowed gets no reply.