How to backup emails on Time Machine

OK. I found the mail folder. I did a restart of the computer. Somehow it was not showing up before the restart and now my library folders are there.

Thank you for the response. I went into Time Machine and scrolled to a date earlier this month and in a search put in user/library/mail/V directory and all I could find was plist. I tried it directly on the external drive and had the same issue. There was no Library under my name as user or shared users. I may be trying to find it wrong but I looked at every library folder and no V directory. I did find the site for Mailbackup X. The email I need is probably lost. I will keep looking.

I had seen one earlier today but I am having difficulty finding it again. I used GO-with the option key in Finder and could not locate it there. I don't remember how I saw it earlier. I also looked in the Mac disk and my external disk. I just have to keep looking.

I appreciate your patience...but I now need my Dunce cap on! How do I search to locate Users/home/library/mail. I tried under Finder, on my Macintosh disk which is listed on Finder and my external drive. I am completely lost as to where to enter the search. I used the search glass to type in the search for each item I mentioned with negative results.

I tried your recommendation and when I use control-shift-g I get a drop down box that requests I open a folder that is named for a particular file that I save for reference. I cannot even change it.