Make sure your business unit address email is populated with any email address invoices will be sent from (separate with semicolon). This includes any email in the business, as well as supplier emails.
Make sure your suppliers have the relevant supplier email addresses against their contact record so that Zahara can recognise the correct supplier.
Generate you unique email-in address – Business > Settings > Invoice Email Address
Email your PDF to your @zaharamail.com address
OCR will process the invoice and it will appear as a draft in your invoices inbox. It is noted that recognition is never 100% accurate so take time to check the values add up.