How to send R markdown report in body of email?

Question

update: Brandon Bertelsen\'s answer:

Brandon\'s answer produces the following output. It doesn\'t produce nice tables or highlight code like Rstudio do

Answer 1

Updated Dec 2019

R Studio has released a email-specific package blastula. I find that this does a good job at inlining CSS for emails.

https://github.com/rich-iannone/blastula