Does anyone know if I can set my client's permissions to upload their own templates and is there anyway to add attachments to emails?
Hi. It's not possible to give your clients permissions to add templates, that's only available to the design. Also, because of a wide variety of reasons we don't allow attachments, sorry.
Best practice would be to simply host the document and link to it rather than adding an attachment.
Many servers will block emails with attachments as spam (Not to mention that the size of the attachment would restrict bandwidth considerably depending how big it is).