Blogger Nauman Leghari has put together a tool for sending automatic file backups to Gmail.
GmailSync is an automated backup tool to synchronize files on your computer to your gmail online storage. By using this, you can theoretically use almost unlimited amount of free space available on your gmail account.
How It Works?
GmailSync is little more than a simple email client. It uses another third party (free) program called Stunnel http://www.stunnel.org/ to wrap SMTP packets in SSL because Gmail SMTP server uses secure connections. For some reason, I am unable to get the EnableSSL property on SmtpClient to work. Stunnel is bundled with the download therefore you don't need to install or setup another other component before running GmailSync. GmailSync keeps track of the backed up files and only does differential backup the second time you run it.