GMail Backup Archives Your Gmail Account Locally
GMail Backup is a free utility you can use to archive your GMail account to your local computer using GMail IMAP support. You can even use it to restore your GMail messages in the event of loss.
The software is available cross-platform, so Windows users can take advantage of it as well as MacOS and Linux users. Unfortunately, only the Windows version uses a graphical user interface (GUI), whereas the MacOS and Linux versions are command line only.
The program saves the messages in Microsoft’s .EML format, which can allow you to browse them offline. You can even upload the archive to another GMail account, making it simple to move your mail from one account to another.
Link: Gmail Backup
