Email, Messaging, & Video Calls Email How to Forward a Message With Mozilla Thunderbird Plus a comparison of inline vs. attachment forwarding 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 on February 17, 2020 Hero Images / Getty Images Email Yahoo! Mail Gmail Tweet Share Email Like other email clients and apps, Mozilla Thunderbird makes forwarding emails simple. It's a quick and handy trick when you receive an email you'd like to share with someone else. Thunderbird Forwarding Options To change whether Mozilla Thunderbird inserts the forwarded message as an attachment or inline in the new email: Open Mozilla Thunderbird. Select the Thunderbird menu (located in the upper-right corner of the Mail window). Select Options (located near the middle of the menu that appears). In the Options menu, select the Options icon to open the Options window. In the left pane of the Options window, select the Composition tab. Select the Forward Messages drop-down arrow. Choose Inline to forward messages in the body of the email window. Select As Attachment to forward all messages as attachments to emails. Select the Add extension to file name check box to send forwards as attachments. Doing so allows your recipients to view the file type more efficiently. Close the Options window. How to Forward an Email in Thunderbird When you receive an email message you want to share, you can edit it before forwarding it to one or more email addresses if desired. Open Mozilla Thunderbird and go to the Inbox. Select the message you want to forward. Double-click the email if you want to open the message in a new window. Select the Forward button (located in the upper-right corner of the message window). A new Forward Message window opens. Alternatively, select Message > Forward from the menu, or use the Ctrl+L keyboard shortcut (Command +L on a Mac or Alt+L for Unix). In the To field, enter the email address or addresses to which you want to forward the message. Alternatively, select the arrow to the left of To, choose Cc or Bcc, then enter the email address or addresses to which you want to forward the message. Check the Subject line. By default, it will begin with Fwd: followed by the original subject, but you can edit it by typing in the Subject box if desired. Trim to the body of the message if desired. For example, to remove unnecessary email addresses or delete irrelevant content. Add a personal message at the beginning of the message body, if desired. Select Send to forward the message to your recipients.