.Dorico is not allowed...

Greetings, I’m trying to send an empty Dorico project to Ulf. When I try and upload the project into a message for Ulf, a warning appears telling me that “the extension .Dorico is not allowed” Any workarounds?
JM

Never-mind, I just zipped it up…
J

That’s right, Dorico projects have to be zipped up in order to be attached here or sent in a PM.