Lets say you have used the Mozilla Thunderbird client for some time and have decided to move to the cloud, more precisely to Gmail or Google Mail.
Question is, how do you get your emails and the folder structure over to Gmail? Sure you could do that manually; create the folders over on the Gmail website and forward each and every of your emails to your Google email address. But that's not very practicable if the mail count exceeds a few dozen. What if you have thousands of emails neatly sorted in folders?
Update: the Thunderbird extension is no longer available. We suggest you use the excellent (and free for personal use) MailStore Home software to back up emails and migrate them to your Gmail account. You may also be able to import emails directly on the Gmail website as you can specify Pop3 or IMAP mailboxes that you want to import there as well. End
You need a third party software like Google webMail Filer for Thunderbird then. The free open source application can process Thunderbird mbox (mailbox) files and import them into Gmail.
Users need to supply their Gmail username and password so that the application can import the mails into the account. That's a problem for some even though the program is open source and theoretically at least possible to find out if something shady is going on (it is not). Still, since most computer users don't have time to analyze source code or the ability to read it in first place, some may skip the software because of the requirement. It would have been better if the program would use Google's official authentication options instead.
I'd still recommend to change the password as soon as the operation has completed successfully. The mail export itself is very simple. It begins by entering the Gmail username and password into the required fields before loading a Thunderbird mail folder using the built-in file browser.
The program scans the selected folder and displays all mbox files in a listing. Each can be selected individually or all by selecting the Tootle Selection option. A click on start filing starts the export of the mails to Gmail. The program monitors the size of the Gmail inbox to block uploading once an 85% fill rate is reached.
Note that you get mailbox folders returned by the program; it is not possible to link mailbox folders with particular emails unless you analyze the folders through other means first.
Users interested in the portable software can download it and its source from the developer homepage over at Admincraft. The software is compatible with 32-bit and 64-bit editions of Windows and requires the Microsoft .NET Framework 3.5.
Google webMail Filer For Thunderbird is a useful program for Windows users who want to move their emails from the desktop email client Thunderbird to Google's Gmail service.Advertisement
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Ghacks is a technology news blog that was founded in 2005 by Martin Brinkmann. It has since then become one of the most popular tech news sites on the Internet with five authors and regular contributions from freelance writers.