Attach PDF to e-mail

For further clarification: It is not an invoice that i wish to attach, but a custom PDF with e.g. our product catalogue.

Hey,
This isn’t within the scope of this plugin, you would have to add some custom function that adds the attachment to woocommerce emails. You can look at this plugin: https://woocommerce.com/products/email-attachments/

There may be others that I’m not aware of.

Ben