I recently migrated from MS Outlook 2003 to Thunderbird 24.4.0 for my personal e-mail because I can't afford the latest MS Outlook and wouldn't really want version 2013 anyway. Prior to the migration, any time someone sent me a personal e-mail at work, I would forward it home as an attachment and move that attachment into my inbox at home. In Thunderbird, I find that when I drag the e-mail attachment from the attachment section to the Inbox folder (the actual folder in the navigation pane or the list of e-mails in the inbox), I get the unavailable symbol (circle with slash through it). I am guessing this is not going to be something I can do in Thunderbird, but wanted to check here and see if anyone had other ways to get the same end result. The reason I have done this historically is to preserve the original e-mail and have the mail client show me who sent it to me. Viewing the forwarded message is fine, but if I want to look for it later, I have to look for a forwarding e-mail from myself instead of the original message that was sent to me. Beyond getting people to use my personal address (really not sure why/how they have my work one), does anyone have any advice that could make this happen? For the record, I also tried resending the e-mail to my personal address as if it were from the original sender, but that won't fly at work due to the security configuration in the Exchange server.