Options available: if Pop mail account. '''You could backup the entire Profile:''' * Install MozBackup tool * info on Profile Backup, MozBackup links and download. * http://kb.mozillazine.org/Profile_backup * http://kb.mozillazine.org/MozBackup * http://mozbackup.jasnapaka.com/download.php '''If you only want to backup specific emails as individual .eml files:''' * Right click on email and choose 'Save As' * select the folder and click on 'Save' '''If you want to have more options and easier to make a copy of several emails then use the ImportExporttool.''' * Install this addon tool: https://freeshell.de//~kaosmos/mboximport-en.html Use the link and scroll down to bottom to see download. * Save the xpi file to your desktop * In Thunderbird, 'Tools' > 'Add-ons' * Add-ons Manager opens in new tab * click on the daisy wheel icon and select 'Install addon from file' * locate the saved .xpi file and click on 'open' * close and restart Thunderbird Now use the tool to Export the folder or emails in the folder. * Right click on folder > ImportExport tool > select from options available such as: * you could 'export all messages in the folder' as 'eml' format See image.