[Enigmail] Can enigmail work with HTML messages in Thunderbird?

[Bo Berglund]

Robert J. Hansen wrote:
>> Last year I installed GPG4Win and then enigmail into Thunderbird.
>> At the time I was told to set up TB for plaintext *only* because
>> otherwise enigmail would not work.
> 
> This advice is almost right.  :)
> 
> Set Thunderbird up to only _generate_ plain text emails.
> 
> As far as _displaying_ mail, Enigmail doesn't care.

I guess this is off topic, but now I have scouted the Tool/Options
window and I can't for the life of me find where the setting is that
forces TB into plain text...
Can anyone with TB on Windows hint where I should go to re-enable HTML
emails?
I would actually want to use HTML as default also for composing, but be
able to change to plaintext if I want to use enigmail for encryption.
But it looks like I have permanently crippled Thunderbird (1.5.0.12).

> 
>> Or is there a setting that allows me to read/compose HTML and still  
>> use
>> enigmail to encrypt or sign the messages (still in HTML)?
> 
> PGP/MIME should allow you to send HTML mail.

What do you mean by this? I don't understand....

/Bo