I think we’ve all e-mailed someone — or a group of people — but forgot to attach the file that we referenced in the message (d’oh). Well, thanks to a handy extension for Thunderbird that I ran across, that may be a thing of the past :). AttachmentRemember checks a message for keywords before it’s sent; and, if it finds any of those keywords but the message doesn’t have any files attached, a warning dialog pops up.
For example, suppose you set it up to look for the word “attach” (which will also catch “attachment” and “attached”, for example, since AttachmentRemember does substring matches). Anyhow, if you were to then write a message with the subject line “Proposal attached” but click Send before attaching any files, a little dialog box would pop up asking if maybe the message should have an attachment.
The idea seems obvious, now that I’ve heard of it, but I’m not sure I would have come up with it on my own. If you choose to download it, though, just be sure to edit the extension’s options before using it (Tools → Extensions → AttachmentRemember → Options) as the list of keywords that it looks for is empty by default.
You don’t happen to know if there’s an extension for Thunderbird that changes the key bindings. I want to use pine key bindings on Thunderbird. I’m so used to them that I used them anyway, so they might as well do something.
It looks like Keyconfig might do what you need.
You might consider also the Attachment Reminder extension (http://attachreminder.sourceforge.net/) which has all the features of AttachmentRemember plus has the option not to scan the quoted message text, and uses full Javascript regexp for more powerful matching.