Could you please explain what “binary” means in the context of your workflow? I received a BINARY file via IMAP email, which happens to be an Excel file. I would like to extract and analyze its content, and perform some additional actions.
It depends a bit on what you want to do exactly. As you cannot simply grab the binary data and then add that into an email extension for example. Binary data is treated differently, except when you first convert it to json. This can be done with the “Move Binary Data” node.
If a node allows you to attach Binary data it will also give you that option and what you then reference is simply the name of the binary data. In you screenshot that would be attachment_0.
In the screenshot below the Source Key is the binary data name. (default is data but in your case could be attachment_0)