I know Time Machine is a great backup system on Mac, but I don't like it when it starts backing up everything on a mac.My work is completely done on emails and these emails now need to be backed up as the mailbox is filling up quickly. I am using Apple Mail as well as Outlook 2016 for Mac, both with different email ids. I need to backup both of them so that I don't lose any emails and also if I need to access those emails in future I can do that easily. Here Time machine is a great app to backup but I don't want to backup other stuff, I just need it to backup my email database. Is that possible, if yes then how can I do that and if no then what are other possible options I have as an email backup system?