I finally got around to setting up my signature in Thunderbird. To set up the signature you have to:
- Create a signature file. This is a straight text file containing your name, some interesting ascii art, a quote that makes you sound learned and a warning that for legal reasons, nobody should ever read your email.
- Open Tools/Account Settings/Manage Identities../Edit../Settings and click the 'Attach this signature' box.
- Click 'Choose' and navigate to your signature file.
When it comes to email I'm a top poster: life's too short to spend scrolling down email messages. If you top post you want your signature at the top of the message, not the bottom where nobody will read it. On the 'Composition & Addressing' tab there is a control to tell it to 'start my reply above the quote' and another to place my signature 'below my reply (above the quote)'. If you choose this option and save the settings and then reopen the settings again the signature is set to 'below the quote (recommended)': looks like a bug in Thunderbird 1.5.0 (or some evil microsoft loving, emacs using, big-endian favouring bottom poster has deliberately broken it).
To get top posting to work correctly you have to go into the file
C:\Documents and Settings\{windows username}\
Application Data\Thunderbird\Profiles\
{random letters}\prefs.js
and change the line that says:
user_pref("mail.identity.id1.sig_bottom", false);
to say
user_pref("mail.identity.id1.sig_bottom", true);
Twitterings

Peter,
THANK YOU for posting this. I knew about the sig_bottom and the need to change it in order to get top posting to completely work. However, nowhere could I find where the appropriate prefs.js is until your blog. I suppose I could have kept searching, but it was just very surprising (and frustrating) that this wasn't better documented somewhere on the Mozilla sites. THANK YOU!
One change: I had to change my values from "true" to "false", not the other way around as suggested in your post, in order to get the signature to automatically appear at the top. Minor, and easy to figure out, but I thought you might want to update your blog posting.
Thanks again!!