Does re go above inside mail line

I think there may be a bit of confusion here!

"Re" is a prefix that means "again" or "in response to", and it's commonly used in email subject lines to indicate that an email is a reply to a previous message.

In an email subject line, "Re" is usually placed at the beginning of the subject line, followed by a brief summary of the email's content. For example:

"Re: Meeting on Friday"

This indicates that the email is a response to a previous message about a meeting on Friday.

So, to answer your question, "re" typically goes above the inside mail line, which is the main body of the email.