Just a heads-up. If you use scripting and email a .c3p file, some mailservers will rename all contained js fails for security reasons. So main.js will be renamed into main.j_ which will result in the project not being able to load anymore. To fix it you have to unzip it yourself and rename it back. Took me by surprise, thought it might be good to put this info out there.
stackoverflow.com/questions/54385807/javascript-file-extensions-are-renamed-from-js-to-j
Huh, that's weird. These days I generally just upload to Dropbox and share a link - it seems to be a lot more reliable. There's lots of other things that can go wrong with email attachments, particularly low size limits.
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I usually don't do it either, but I do sometimes email myself various random files.