When submitting work via email, always follow the rules above, and always convert your documents to PDF and attach them to the email. I cannot count the number of times I've run into permissions or compatibility issues with documents that Scouts have sent me. Converting to PDF and attaching has worked every time, and it's something you should know how to do!
When emailing your work, make sure you follow the rules in Email Notes, and make sure your work is formatted following Work Format & Templates.
Your work should be formatted in a way that makes it easy for me to read (see Work Format & Templates for a general starting point for any Merit Badge requirement). Remember to check that the work you're submitting:
Actually satisfies the requirement,
Includes all the required information for the requirement,
Follows any examples from the Scout Handbook or Merit Badge booklet, and
Makes coherent sense.
I don't expect a Master's thesis, but if I'm having trouble following your thought process, I'm going to send it back!
Always attach your work as a PDF to the email. Do not (again: do not) send a link to a Google Doc or other online document editing program, or attached in the native word processing format (e.g., docx file). I frequently run into permissions or software compatibility issues with documents Scouts try to send this way, and I will not spend time trying to figure out why I can't open it. I've had so many problems opening Google Docs links Scouts have tried to send me that I will not try to open the link.