Email, Messaging, & Video Calls Email Import Email From Mozilla Thunderbird Into Gmail By Heinz Tschabitscher Writer A former freelance contributor who has reviewed hundreds of email programs and services since 1997. our editorial process Heinz Tschabitscher Updated January 10, 2020 Plommespiser / Wikimedia Commons / CC BY-SA 4.0 Email Gmail Yahoo! Mail Tweet Share Email Gmail offers a great deal of space, useful search capabilities, and universal access. You can bring all this utility to your Mozilla Thunderbird email by importing it into your Gmail account. Just a few minutes of configuration will make your email accessible, searchable, and securely stored. Why Not Just Forward Your Messages? Sure, you can forward the messages, but this is hardly an elegant or fully functional solution. The messages will lose their original senders, and emails you've sent won't appear to have been sent by you. You'll also lose some of Gmail's very useful organizational capabilities—for instance, Conversation View, which groups emails on the same topic together. Import Email From Mozilla Thunderbird to Gmail Using IMAP Fortunately, Gmail offers IMAP access—a protocol that keeps your emails on a server but lets you see and work with them as if they were stored locally (meaning, on your device). Fortunately, it also turns importing email into a rather simple drag-and-drop affair. To copy your messages from Mozilla Thunderbird to Gmail: Set up Gmail as an IMAP account in Mozilla Thunderbird. Open the folder containing the emails you want to import. Highlight the messages you want to import. (If you want to import them all, press Ctrl-A or Command-A to highlight all messages.) Right click one of the messages that you want to copy over. In the menu that pops open, select Copy To > the Gmail address > the folder you want to import them to, like the Inbox. You can open your Gmail account outside of Thunderbird to verify that your messages are where you imported them.