Learn how to add attachments to your newsletters 

It isn't directly possible to add an attachment as with your messaging software.

On the other hand, you can insert a link to an online file or to a file that was downloaded on the Mailpro server before. See file sizes and extensions accepted.

Please proceed as follow:

Use the linking function (the globe icon) of your editor to link to a file that is on your Mailpro server. If the file isn't on the server yet, please download it with the “download your file” button and then double click on the file to select it.
Confirm with OK.
Your link points to the file and the file can be downloaded from this link.