No, it is not a misconception. How do I apply a patch from gmail to a specific git repo on my computer? (I would genuinely like to know the answer, but it must not involve mutt, gnus, or dovecot!)
git am < saved_email_file.eml |git am
once you have the message open.Most people are using gmail, but when it comes to local clients, Outlook, Apple Mail and Thunderbird are by far the most common and as far as I know none of them support this without extra steps.