Attach Pdf's to Order Emails
To attach your customised pdf files to sales emails, go to Stores > Configuration > Sales > Sales Emails. Click into each email type and individually configure every email type you see below with the pdf documents you want to automatically attach.
Example: Invoice email settings
Standard Magento Settings
The first six settings are standard Magento settings - configure these as per normal.
Be sure to enable automatic sales emails.
Attach Invoice/Shipment/Credit Memo as Pdf (v1.0.0+)
When set to “Yes”, your invoice/shipment/credit memo pdf document will be automatically attached to the order/invoice/shipment/credit memo email.
Attach Order as Pdf (v1.0.0+)
You can also choose to automatically attach an order document to the order email. This requires the free Fooman Print Order Pdf extension - you’ll need to install this first in order for this feature to be enabled: Link to free download.
Attach Terms and Conditions (v1.0.0+)
When set to “Yes”, your Terms and Conditions html and text files (from Sales > Terms and Conditions) will be automatically attached to the email.